Computer Tutorials

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Virus also known as- IT University Sohanad W32.HLLW.Ssdx newfolder.exe

If this virus infected in you computer, It will Disable the following …

Task Manager, Registry Editor, Folder Options, Run in start menu

And it will create exes like the icon of folders. If this virus is running it will use more than 50 % of your processor

Download any one of the following tool to remove new folder.exe virus

Download Tool 1 | Download Tool 2 ( run tools In safe mode )

Manually remove it (new folder.exe Fix)

Delete File named svichossst.exe

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
“@”=[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
“Yahoo Messengger”=

1. Use Firefox as your browser rather than Internet Explorer.

2. Keep your computer updated with the latest anti-virus and anti-spyware software, and be sure to use a good firewall.

3. Never open an email attachment unless you are POSITIVE about the source.

4. Do NOT click on any pop-up that advertises anti-virus or anti-spyware software, especially a program promising to provide every feature known to mankind. (Also remember: the fakes often mimic well-known brands such as Grisoft AVG, Norton and McAfee.)

5. If a virus alert appears on your screen, do NOT touch it. Don't use your mouse to eliminate or scan for viruses, and DON'T use your mouse to close the window. Instead, hit control + alt + delete to view a list of programs currently running. Delete the "rogue" from the list of running programs, and call your computer maker's phone or online tech support service to learn if you can safely use your computer.

6. Do not download freeware or shareware unless you know it's from a reputable source.

7. Avoid questionable websites. Some sites may automatically download malicious software onto your computer.

8. Reset your current security settings to a higher level.

9. Although fake software may closely resemble the real thing, it's rarely an exact match. Look for suspicious discrepancies.

10. Check out this list of rogue/fake anti-virus and anti-spyware products.


List of rogue / fake antivirus / anti spyware products


Advanced Cleaner[3]
AlfaCleaner
AntiSpyCheck 2.1
AntiSpyStorm
AntiSpywareBot [4]
AntiSpywareExpert
AntiSpywareMaster
AntiSpywareSuite
AntiSpyware 2008 XP
Antivermins
Antivirgear
Antivirus 2008
Antivirus 2009
AntiVirus Gold [5]
Antivirus Master
Antivirus XP 2008 [6]
Awola 6.0
Brave Sentry
BestsellerAntivirus
Cleanator
ContraVirus
Doctor Antivirus
DriveCleaner [7]
Disk Knight
EasySpywareCleaner
Errorsafe
free-viruscan.com
IE Antivirus
IEDefender
InfeStop
KVMSecure
MacSweeper
MalCrush 3.7
MalwareCore
MalwareAlarm
Malware Bell 3.2
Microsoft AntiVirus
PCSecureSystem [8]
PC Antispy [9]
PC Clean Pro [10]
PC SpeedScan Pro
PestTrap [11]
Perfect Cleaner
PAL Spyware Remover
PCPrivacytool
PC-Antispyware
PSGuard
SecurePCCleaner
Security toolbar 7.1
SpyAxe [12]
Spy Away
SpyCrush
Spydawn [13]
SpyGuarder
SpyHeal
Spylocked [14]
SpySheriff [15]
SpySpotter
Spyware Cleaner
Spyware Quake [16]
Spyware Stormer
SpywareStrike
Spy-Rid
SpyWiper
System Live Protect [17]
SystemDoctor
TrustedAntivirus
TheSpyBot
UltimateCleaner
VirusHeat
Virus Isolator
VirusProtectPro
VirusRanger
Vista Antivirus 2008
WinAntiVirus Pro 2006
WinFixer [18]
WinSpywareProtect
WorldAntiSpy
XP Antivirus
XoftSpySE
Zinaps 2008

To disable the stupid feature in WinXP which tries to send a report to microsoft every time a program crashes you will have to do this:

*************************************************************************

Open Control Panel
Click on Performance and Maintenance.
Click on System.
Then click on the Advanced tab
Click on the error reporting button on the bottom of the windows.
Select Disable error reporting.
Click OK
Click OK

*************************************************************************

Open a Command Prompt window and leave it open.
Close all open programs.
Click Start, Run and enter TASKMGR.EXE
Go to the Processes tab and End Process on Explorer.exe.
Leave Task Manager open.
Go back to the Command Prompt window and change to the directory the AVI (or other undeletable file) is located in.
At the command prompt type DEL where is the file you wish to delete.
Go back to Task Manager, click File, New Task and enter EXPLORER.EXE to restart the GUI shell.
Close Task Manager.


Or you can try this

Open Notepad.exe

Click File>Save As..>

locate the folder where ur undeletable file is

Choose 'All files' from the file type box

click once on the file u wanna delete so its name appears in the 'filename' box

put a " at the start and end of the filename
(the filename should have the extension of the undeletable file so it will overwrite it)

click save,

It should ask u to overwrite the existing file, choose yes and u can delete it as normal


Here's a manual way of doing it. I'll take this off once you put into your first post zain.

1. Start
2. Run
3. Type: command
4. To move into a directory type: cd c:\*** (The stars stand for your folder)
5. If you cannot access the folder because it has spaces for example Program Files or Kazaa Lite folder you have to do the following. instead of typing in the full folder name only take the first 6 letters then put a ~ and then 1 without spaces. Example: cd c:\progra~1\kazaal~1
6. Once your in the folder the non-deletable file it in type in dir - a list will come up with everything inside.
7. Now to delete the file type in del ***.bmp, txt, jpg, avi, etc... And if the file name has spaces you would use the special 1st 6 letters followed by a ~ and a 1 rule. Example: if your file name was bad file.bmp you would type once in the specific folder thorugh command, del badfil~1.bmp and your file should be gone. Make sure to type in the correct extension.

How to create a bootable Windows XP SP3 CD (Nero):
Step 1

Create 3 folders - C:\WINXPSP3, C:\SP1106 and C:\XPBOOT

Step 2

Copy the entire Windows XP CD into folder C:\WINXPSP3

Step 3

You will have to download the SP3 Update, which is 133MB.
Rename the Service Pack file to XP-SP3.EXE
Extract the Service Pack from the Run Dialog using the command:
C:\XP-SP3.EXE -U -X:C:\SP1106

Step 4

Open Start/Run... and type the command:
C:\SP1106\update\update.exe -s:C:\WINXPSP3

Click OK

Folder C:\WINXPSP3 contains: Windows XP SP3



How to Create a Windows XP SP3 CD Bootable

Step 1

Download xpboot.zip
Code:
Code:
http://thro.port5.com/xpboot.zip

( no download manager !! )

Extract xpboot.zip file (xpboot.bin) in to the folder C:\XPBOOT

Step 2

Start Nero - Burning Rom.
Select File > New... from the menu.
1.) Select CD-ROM (Boot)
2.) Select Image file from Source of boot image data
3.) Set Kind of emulation: to No Emulation
4.) Set Load segment of sectors (hex!): to 07C0
5.) Set Number of loaded sectors: to 4
6.) Press the Browse... button



Step 3

Select All Files (*.*) from File of type:
Locate boot.bin in the folder C:\XPBOOT

Step 4

Click ISO tab
Set File-/Directory length to ISO Level 1 (Max. of 11 = 8 + 3 chars)
Set Format to Mode 1
Set Character Set to ISO 9660
Check all Relax ISO Restrictions




Step 5

Click Label Tab
Select ISO9660 from the drop down box.
Enter the Volume Label as WB2PFRE_EN
Enter the System Identifier as WB2PFRE_EN
Enter the Volume Set as WB2PFRE_EN
Enter the Publisher as MICROSOFT CORPORATION
Enter the Data Preparer as MICROSOFT CORPORATION
Enter the Application as WB2PFRE_EN

* For Windows XP Professional OEM substitute WB2PFRE_EN with WXPOEM_EN
* For Windows XP Home OEM substitute WB2PFRE_EN with WXHOEM_EN

Step 6

Click Burn tab
Check Write
Check Finalize CD (No further writing possible!)
Set Write Method to Disk-At-Once

Press New button

Step 7

Locate the folder C:\WINXPSP3
Select everything in the folder and drag it to the ISO compilation panel.
Click the Write CD Dialog button.

Press Write

You're done.

Hey again, this is a real quick guide for anyone interested to get a movie onto there PSP without all the fluff i have seen elsewhere. I just watched Africa the Serengeti on my PSP and heres is the lowdown.

Movie - approx 40 minutes - dvd
Saved to hard drive - 2.6GIG - using DVD Decryptor (free program) try google
Transfered to avi format - 377MB- using Super DVD Ripper (9 FREE trial uses) then you must buy
Transfered to MP4 - 37MB - using the (basically free) Image convertor 2

Average movie breakdown - using above as a guide only.
so im guessing the average movie may be 4.5gig for example
saved to 800MB
CONVERTED TO 70-80MB

Ok use DVD decryptor to save the movie to your hard drive eg. C:\africa (it will save it for you as described)
When completed find the folder c:\africa on your computer and find the vob file in that folder - generally the largest one and right click and play it with your dvd program to see what part it is. If its the correct movie part you now know thats the one you need.

Once you have located the vob file you want to transfer open DVD Ripper and go to wizard icon. There you will see an icon of VOB to AVI button. Click it and then it will ask to locate the file. Locate the file and click it. It will SCAN THE FILE(just wait till that finishes) a parameter box opens next and just click the arrow. It then askes to choose output file, click the file icon and locate the correct fob file. It then askes for file compression - choose microsoft windows media and then click ok Then press the start button. It will now convert the vob into avi format.
(there are also other opions ie;dvd to avi etc) I have only used the vob to avi for this test.

After DVD ripper has transferred the file it will save it to the same folder as the original move was in eg: c:\africa\viteots. Open the file and you will now see an AVI icon containing the movie.

Make sure you PSP is on and in usb mode then Open Image convertor 2 and press on movie / add to list. For this example i click on C:drive the found the folder Africa and opened it and there was my converted AVI file. Click the file press ok and it will be transfered to your PSP for viewing pleasure.

*****Note**** i only converted one VOB file as thatS all there was for this particular movie. If you have more then one vob file you may need to try the dvd to avi when you rip. This is just a guide i worked out to compress dvd into the smallest possible file so you can get value out of a 512 card.

QUOTE
http://www.crazyhatsoftware.com/ImageConverter2.1.exe

Image Converter 2.1 JAP translated to ENG.

Burn a BIN without a CUE using NERO

You've downloaded a *.BIN file, but there was no *.CUE file associated and you still want to burn the *.BIN file using Nero

Your options are:

1) Create yourself a *.CUE

2) Convert the *.BIN to an *.ISO

3) OR use Nero to burn without the *.CUE file!!!

Yes, that's possible... just follow these steps and you will be sorted. No need for *.CUE files anymore

Ok, here we go...

1) Start Nero

2) File -> Burn Image

3) Browse to the *.BIN file that you want to burn and open it

4) A window saying "Foreign Image Settings" will open

5) Check the settings. They should be as followed:

* Type of image: leave it to Data Mode 1
* Select the Raw Data check box
Note ->> The block size will change automatically from 2048 to 2352
* Leave Image Header and Image Trailer unchanged and set to 0
* Leave "Scrambled" and "Swapped" check boxes unchecked

6) Click on burn!

7) Enjoy

This tut was for Nero 5.x.x.x, I was told that "Burn Image" is under "recorder" in Nero 6. The rest of the steps should be the same...

Burning BIN/CUE Images with Nero Burning Rom

BIN/CUE image format is quite common on the Internet. It might seem that finding an appropriate software for burning these images is quite hard. Luckily, it's not. In addition to Golden Hawk CDRWin, the original software for BIN/CUE format, you can also use Nero Burning Rom to burn the images.

Please make sure that you have the latest version of Nero, which now is 5.5.10.0


Verify the CUE-sheet and open it with Nero
Before doing anything else you have to verify that the path in the CUE-sheet is correct. A CUE-sheet is a plaintext file describing the structure and the location of the BIN-file. You can open up the .CUE -file using, for example, Notepad.

The file should look something like this:

FILE "IMAGE.BIN" BINARY
TRACK 01 MODE1/2352
INDEX 01 00:00:00


Usually the CUE-filename and the BIN-filename have the same body -- e.g. IMAGE. All you need to do is verify that there is no path information on the
FILE "IMAGE.BIN" BINARY
-line. Ie. it should NOT read e.g.
FILE "C:\TEMP\IMAGE.BIN" BINARY
If there is any path information on the line, just remove it so that you have just the name of the .BIN-file as in the example above. Also make sure that the name of the .BIN in the CUE-sheet is the same as the actual .BIN file you have on hard-disk.

Next load Nero Burning Rom and choose File, Burn Image....

Load the CUE-sheet in Nero
Choose the Files of Type: dropdown menu and select All Files *.*. Next just locate the .CUE file, select it and click Open. Make sure you select the .CUE -file, not the .BIN -file.

Burn the image
All you have to do then is choose the writing speed, select the Disc-At-Once Write Method, and click Write.

That's it! After a couple of minutes you'll have a CD with the BIN/CUE Image written on it.


NOTES:
--> Do not worry if the BIN file seems larger than the capacity of your CD-R or CD-RW. Bin files are raw data and once burned, the file size is smaller.

--> If you have a DVD burner, just burn the cue/bin directly onto the DVD. Then use Daemon Tools to mount the cue/bin image when you use the files. This way you maintain a true exact image. And Daemon Tools (also Alcohol CDR burning software, which has the same feature) mounts the image, and you see the files instead of the bin/cue.
_________________

This is well written explanation about bandwidth, very useful info.



BandWidth Explained

Most hosting companies offer a variety of bandwidth options in their plans. So exactly what is bandwidth as it relates to web hosting? Put simply, bandwidth is the amount of traffic that is allowed to occur between your web site and the rest of the internet. The amount of bandwidth a hosting company can provide is determined by their network connections, both internal to their data center and external to the public internet.


Network Connectivity

The internet, in the most simplest of terms, is a group of millions of computers connected by networks. These connections within the internet can be large or small depending upon the cabling and equipment that is used at a particular internet location. It is the size of each network connection that determines how much bandwidth is available. For example, if you use a DSL connection to connect to the internet, you have 1.54 Mega bits (Mb) of bandwidth. Bandwidth therefore is measured in bits (a single 0 or 1). Bits are grouped in bytes which form words, text, and other information that is transferred between your computer and the internet.

If you have a DSL connection to the internet, you have dedicated bandwidth between your computer and your internet provider. But your internet provider may have thousands of DSL connections to their location. All of these connection aggregate at your internet provider who then has their own dedicated connection to the internet (or multiple connections) which is much larger than your single connection. They must have enough bandwidth to serve your computing needs as well as all of their other customers. So while you have a 1.54Mb connection to your internet provider, your internet provider may have a 255Mb connection to the internet so it can accommodate your needs and up to 166 other users (255/1.54).


Traffic

A very simple analogy to use to understand bandwidth and traffic is to think of highways and cars. Bandwidth is the number of lanes on the highway and traffic is the number of cars on the highway. If you are the only car on a highway, you can travel very quickly. If you are stuck in the middle of rush hour, you may travel very slowly since all of the lanes are being used up.

Traffic is simply the number of bits that are transferred on network connections. It is easiest to understand traffic using examples. One Gigabyte is 2 to the 30th power (1,073,741,824) bytes. One gigabyte is equal to 1,024 megabytes. To put this in perspective, it takes one byte to store one character. Imagine 100 file cabinets in a building, each of these cabinets holds 1000 folders. Each folder has 100 papers. Each paper contains 100 characters - A GB is all the characters in the building. An MP3 song is about 4MB, the same song in wav format is about 40MB, a full length movie can be 800MB to 1000MB (1000MB = 1GB).

If you were to transfer this MP3 song from a web site to your computer, you would create 4MB of traffic between the web site you are downloading from and your computer. Depending upon the network connection between the web site and the internet, the transfer may occur very quickly, or it could take time if other people are also downloading files at the same time. If, for example, the web site you download from has a 10MB connection to the internet, and you are the only person accessing that web site to download your MP3, your 4MB file will be the only traffic on that web site. However, if three people are all downloading that same MP at the same time, 12MB (3 x 4MB) of traffic has been created. Because in this example, the host only has 10MB of bandwidth, someone will have to wait. The network equipment at the hosting company will cycle through each person downloading the file and transfer a small portion at a time so each person's file transfer can take place, but the transfer for everyone downloading the file will be slower. If 100 people all came to the site and downloaded the MP3 at the same time, the transfers would be extremely slow. If the host wanted to decrease the time it took to download files simultaneously, it could increase the bandwidth of their internet connection (at a cost due to upgrading equipment).


Hosting Bandwidth

In the example above, we discussed traffic in terms of downloading an MP3 file. However, each time you visit a web site, you are creating traffic, because in order to view that web page on your computer, the web page is first downloaded to your computer (between the web site and you) which is then displayed using your browser software (Internet Explorer, Netscape, etc.) . The page itself is simply a file that creates traffic just like the MP3 file in the example above (however, a web page is usually much smaller than a music file).

A web page may be very small or large depending upon the amount of text and the number and quality of images integrated within the web page. For example, the home page for CNN.com is about 200KB (200 Kilobytes = 200,000 bytes = 1,600,000 bits). This is typically large for a web page. In comparison, Yahoo's home page is about 70KB.


How Much Bandwidth Is Enough?

It depends (don't you hate that answer). But in truth, it does. Since bandwidth is a significant determinant of hosting plan prices, you should take time to determine just how much is right for you. Almost all hosting plans have bandwidth requirements measured in months, so you need to estimate the amount of bandwidth that will be required by your site on a monthly basis

If you do not intend to provide file download capability from your site, the formula for calculating bandwidth is fairly straightforward:

Average Daily Visitors x Average Page Views x Average Page Size x 31 x Fudge Factor

If you intend to allow people to download files from your site, your bandwidth calculation should be:

[(Average Daily Visitors x Average Page Views x Average Page Size) +
(Average Daily File Downloads x Average File Size)] x 31 x Fudge Factor

Let us examine each item in the formula:

Average Daily Visitors - The number of people you expect to visit your site, on average, each day. Depending upon how you market your site, this number could be from 1 to 1,000,000.

Average Page Views - On average, the number of web pages you expect a person to view. If you have 50 web pages in your web site, an average person may only view 5 of those pages each time they visit.

Average Page Size - The average size of your web pages, in Kilobytes (KB). If you have already designed your site, you can calculate this directly.

Average Daily File Downloads - The number of downloads you expect to occur on your site. This is a function of the numbers of visitors and how many times a visitor downloads a file, on average, each day.

Average File Size - Average file size of files that are downloadable from your site. Similar to your web pages, if you already know which files can be downloaded, you can calculate this directly.

Fudge Factor - A number greater than 1. Using 1.5 would be safe, which assumes that your estimate is off by 50%. However, if you were very unsure, you could use 2 or 3 to ensure that your bandwidth requirements are more than met.

Usually, hosting plans offer bandwidth in terms of Gigabytes (GB) per month. This is why our formula takes daily averages and multiplies them by 31.


Summary

Most personal or small business sites will not need more than 1GB of bandwidth per month. If you have a web site that is composed of static web pages and you expect little traffic to your site on a daily basis, go with a low bandwidth plan. If you go over the amount of bandwidth allocated in your plan, your hosting company could charge you over usage fees, so if you think the traffic to your site will be significant, you may want to go through the calculations above to estimate the amount of bandwidth required in a hosting plan.

Before you spend a dime on security, there are many precautions you can take that will protect you against the most common threats.

1. Check Windows Update and Office Update regularly (_http://office.microsoft.com/productupdates); have your Office CD ready. Windows Me, 2000, and XP users can configure automatic updates. Click on the Automatic Updates tab in the System control panel and choose the appropriate options.

2. Install a personal firewall. Both SyGate (_www.sygate.com) and ZoneAlarm (_www.zonelabs.com) offer free versions.


3. Install a free spyware blocker. Our Editors' Choice ("Spyware," April 22) was SpyBot Search & Destroy (_http://security.kolla.de). SpyBot is also paranoid and ruthless in hunting out tracking cookies.

4. Block pop-up spam messages in Windows NT, 2000, or XP by disabling the Windows Messenger service (this is unrelated to the instant messaging program). Open Control Panel | Administrative Tools | Services and you'll see Messenger. Right-click and go to Properties. Set Start-up Type to Disabled and press the Stop button. Bye-bye, spam pop-ups! Any good firewall will also stop them.

5. Use strong passwords and change them periodically. Passwords should have at least seven characters; use letters and numbers and have at least one symbol. A decent example would be f8izKro@l. This will make it much harder for anyone to gain access to your accounts.

6. If you're using Outlook or Outlook Express, use the current version or one with the Outlook Security Update installed. The update and current versions patch numerous vulnerabilities.

7. Buy antivirus software and keep it up to date. If you're not willing to pay, try Grisoft AVG Free Edition (Grisoft Inc., w*w.grisoft.com). And doublecheck your AV with the free, online-only scanners available at w*w.pandasoftware.com/activescan and _http://housecall.trendmicro.com.

8. If you have a wireless network, turn on the security features: Use MAC filtering, turn off SSID broadcast, and even use WEP with the biggest key you can get. For more, check out our wireless section or see the expanded coverage in Your Unwired World in our next issue.

9. Join a respectable e-mail security list, such as the one found at our own Security Supersite at _http://security.ziffdavis.com, so that you learn about emerging threats quickly and can take proper precautions.

10. Be skeptical of things on the Internet. Don't assume that e-mail "From:" a particular person is actually from that person until you have further reason to believe it's that person. Don't assume that an attachment is what it says it is. Don't give out your password to anyone, even if that person claims to be from "support."

ADSL - Asymmetric Digital Subscriber Line
AGP - Accelerated Graphics Port
ALI - Acer Labs, Incorporated
ALU - Arithmetic Logic Unit
AMD - Advanced Micro Devices
APC - American Power Conversion
ASCII - American Standard Code for Information Interchange
ASIC - Application Specific Integrated Circuit
ASPI - Advanced SCSI Programming Interface
AT - Advanced Technology
ATI - ATI Technologies Inc.
ATX - Advanced Technology Extended

--- B ---
BFG - BFG Technologies
BIOS - Basic Input Output System
BNC - Barrel Nut Connector

--- C ---
CAS - Column Address Signal
CD - Compact Disk
CDR - Compact Disk Recorder
CDRW - Compact Disk Re-Writer
CD-ROM - Compact Disk - Read Only Memory
CFM - Cubic Feet per Minute (ft�/min)
CMOS - Complementary Metal Oxide Semiconductor
CPU - Central Processing Unit
CTX - CTX Technology Corporation (Commited to Excellence)

--- D ---

DDR - Double Data Rate
DDR-SDRAM - Double Data Rate - Synchronous Dynamic Random Access Memory
DFI - DFI Inc. (Design for Innovation)
DIMM - Dual Inline Memory Module
DRAM - Dynamic Random Access Memory
DPI - Dots Per Inch
DSL - See ASDL
DVD - Digital Versatile Disc
DVD-RAM - Digital Versatile Disk - Random Access Memory

--- E ---
ECC - Error Correction Code
ECS - Elitegroup Computer Systems
EDO - Extended Data Out
EEPROM - Electrically Erasable Programmable Read-Only Memory
EPROM - Erasable Programmable Read-Only Memory
EVGA - EVGA Corporation

--- F ---
FC-PGA - Flip Chip Pin Grid Array
FDC - Floppy Disk Controller
FDD - Floppy Disk Drive
FPS - Frame Per Second
FPU - Floating Point Unit
FSAA - Full Screen Anti-Aliasing
FS - For Sale
FSB - Front Side Bus

--- G ---
GB - Gigabytes
GBps - Gigabytes per second or Gigabits per second
GDI - Graphical Device Interface
GHz - GigaHertz

--- H ---
HDD - Hard Disk Drive
HIS - Hightech Information System Limited
HP - Hewlett-Packard Development Company
HSF - Heatsink-Fan

--- I ---
IBM - International Business Machines Corporation
IC - Integrated Circuit
IDE - Integrated Drive Electronics
IFS- Item for Sale
IRQ - Interrupt Request
ISA - Industry Standard Architecture
ISO - International Standards Organization

--- J ---
JBL - JBL (Jame B. Lansing) Speakers
JVC - JVC Company of America

- K ---
Kbps - Kilobits Per Second
KBps - KiloBytes per second

--- L ---
LG - LG Electronics
LAN - Local Are Network
LCD - Liquid Crystal Display
LDT - Lightning Data Transport
LED - Light Emitting Diode

--- M ---
MAC - Media Access Control
MB � MotherBoard or Megabyte
MBps - Megabytes Per Second
Mbps - Megabits Per Second or Megabits Per Second
MHz - MegaHertz
MIPS - Million Instructions Per Second
MMX - Multi-Media Extensions
MSI - Micro Star International

--- N ---
NAS - Network Attached Storage
NAT - Network Address Translation
NEC - NEC Corporation
NIC - Network Interface Card

--- O ---
OC - Overclock (Over Clock)
OCZ - OCZ Technology
OEM - Original Equipment Manufacturer

--- P ---
PC - Personal Computer
PCB - Printed Circuit Board
PCI - Peripheral Component Interconnect
PDA - Personal Digital Assistant
PCMCIA - Peripheral Component Microchannel Interconnect Architecture
PGA - Professional Graphics Array
PLD - Programmable Logic Device
PM - Private Message / Private Messaging
PnP - Plug 'n Play
PNY - PNY Technology
POST - Power On Self Test
PPPoA - Point-to-Point Protocol over ATM
PPPoE - Point-to-Point Protocol over Ethernet
PQI - PQI Corporation
PSU - Power Supply Unit

--- R ---
RAID - Redundant Array of Inexpensive Disks
RAM - Random Access Memory
RAMDAC - Random Access Memory Digital Analog Convertor
RDRAM - Rambus Dynamic Random Access Memory
ROM - Read Only Memory
RPM - Revolutions Per Minute

--- S ---
SASID - Self-scanned Amorphous Silicon Integrated Display
SCA - SCSI Configured Automatically
SCSI - Small Computer System Interface
SDRAM - Synchronous Dynamic Random Access Memory
SECC - Single Edge Contact Connector
SODIMM - Small Outline Dual Inline Memory Module
SPARC - Scalable Processor ArChitecture
SOHO - Small Office Home Office
SRAM - Static Random Access Memory
SSE - Streaming SIMD Extensions
SVGA - Super Video Graphics Array
S/PDIF - Sony/Philips Digital Interface

--- T ---
TB - Terabytes
TBps - Terabytes per second
Tbps - Terabits per second
TDK - TDK Electronics
TEC - Thermoelectric Cooler
TPC - TipidPC
TWAIN - Technology Without An Important Name

--- U ---
UART - Universal Asynchronous Receiver/Transmitter
USB - Universal Serial Bus
UTP - Unshieled Twisted Pair

--- V ---
VCD - Video CD
VPN - Virtual Private Network

--- W ---
WAN - Wide Area Network
WTB - Want to Buy
WYSIWYG - What You See Is What You Get

--- X ---
XGA - Extended Graphics Array
XFX - XFX Graphics, a Division of Pine
XMS - Extended Memory Specification
XT - Extended Technology

The difference between DVD-R, DVD+R, DVD+RW and DVD-RW explained

There's DVD+R, DVD+RW, DVD-R, DVD-RW, and even DVD-ROM! So what's the difference between all of these different names, aren't all DVDs the same? Well, it's not quite that simple.

Let's first start with the most obvious difference: some have R and some have RW. The "R" stands for readable, while the "W" stands for writeable.

The main difference between DVD-R and DVD-RW, or DVD+R and DVD+RW is that the R disc formats can only be written to once, and then it is only readable and can’t be erased for the rest of its digital life. While RW discs are can be written to and erased many times, they are both readable and writeable.

"R" discs are perfect if they are only needed to be written to once, such as giving some files to a friend or transferring them between PCs. "RW" discs have their strength in the ability to be used many times over, which is great for routine system backups, etc. And naturally, the RW discs are slightly more expensive than the R discs, but you'll have to decide if the trade offs are worth the money.

Now, onto the difference between DVD-R and DVD+R. As I just described above, DVD-R & DVD-RW are sister discs, the difference being one is writeable once, while the other is writeable multiple times. The same thing is true for DVD+R & DVD+RW. So the question is, what's the difference between the plus and minus?

In order to explain this we must take a trip back in time. When DVDs were first being developed, there was no industry standard. Multiple companies were competing to develop what they hoped would be the dominant form of the future.

The DVD-R DVD+R difference can easily be summarized by the following:

* The DVD-R/RW standard was developed by Pioneer, and is used primarily by Apple and Pioneer. These "minus" discs can only be written to in one layer on the discs surface. In addition, this format is supported by the DVD forum, but is in no way an industry standard. DVD-R/RW discs are cheaper than the "plus" format.
* The DVD+R/RW format is supported by Philips, Dell, Sony, HP, and Mcft. These discs can be written to in multiple layers, giving them slightly better and more disc storage than the "minus" format. Because of this additional capacity, they are slightly more expensive than "minus" discs.

A couple final things to clear up is the difference between DVD-ROM and DVD+RW, or the other DVD formats I mentioned above. The DVD-ROM drive can only read DVDs, while the other DVD drives can read and write data to DVDs.

And naturally the DVD+RW CD+RW difference can be explained by the "DVD" or "CD" prefix. DVDs, on average, can store up to 4.7 GB of data, while a CD can only store about 700 MB of data, or about 15% of a DVD's capacity. While CDs are slightly cheaper, in my opinion, the benefits of DVDs are much greater.

So now that you've learned about the difference between DVD-R, DVD+R, DVD-RW, DVD+RW, and even DVD-ROM, which one is right for you? The easiest way to determine which is more beneficial is to watch the industry trends. A few years ago all pre-built computers were shipping with DVD-ROM drives. Today, most PCs have a burnable DVD drive.

I feel that the benefits of having a burnable DVD drive far outweigh any additional costs. They store much more data, and they are ideal for storing your home movies to watch on your DVD player.

My advice is to look at DVD burners that support all of the major formats I've mentioned above, DVD-R, DVD+R, DVD-RW, and DVD+RW. While a DVD drive that supports all of these formats may be slightly more expensive, it will allow you to use any type of DVD disc to burn to, and you'll be protected from any industry shifts to one format or the other.

Windows uses 20% of your bandwidth Here's how to Get it back

A nice little tweak for XP. Microsoft reserve 20% of your available bandwidth for their own purposes (suspect for updates and interrogating your machine etc..)

Here's how to get it back:

Click Start-->Run-->type "gpedit.msc" without the "

This opens the group policy editor. Then go to:


Local Computer Policy-->Computer Configuration-->Administrative Templates-->Network-->QOS Packet Scheduler-->Limit Reservable Bandwidth


Double click on Limit Reservable bandwidth. It will say it is not configured, but the truth is under the 'Explain' tab :

"By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default."

So the trick is to ENABLE reservable bandwidth, then set it to ZERO.

This will allow the system to reserve nothing, rather than the default 20%.

I have tested on XP Pro, and 2000
other o/s not tested.

Please give me feedback about your results

Go to Start --> Run --> Regedt32

Go to HKEY_CURRENT_USER\Control Panel\Desktop

Locate the key called "MenuShowDelay" and it is probably set to 400.

Change that value to 150.

Reboot your computer.

You should notice a slight increase in the speed of your menus

Mozilla Firefox, Speed it up!

Speed up Mozilla FireFox

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1. Type "about :config" in the adress field.
2. Set the value of network.http.pipelining to "true".
3. Set the value of network.http.pipelining.maxrequests to "100".
4. Set the value of network.http.proxy.pipelining to "true"
5. Set the value of nglayout.initialpaint.delay to "0" (not availible in newer versions)

Windows 2k/XP

1. First, open the Windows Registry using Regedit, and (after backing up) navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\ServiceProvider
2. Note the following lines (all hex dwords):
Class = 008 ( biggrin.gif - indicates that TCP/IP is a name service provider, don't change
LocalPriority = 1f3 (499) - local names cache
HostsPriority = 1f4 (500) - the HOSTS file
DnsPriority = 7d0 (2000) - DNS
NetbtPriority = 7d1 (2001) - NetBT name-resolution, including WINS
3. What we're aiming to do is increase the priority of the last 4 settings, while keeping their order. The valid range is from -32768 to +32767 and lower numbers mean higher priority compared to other services. What we're aiming at is lower numbers without going to extremes, something like what's shown below should work well:
4. Change the "Priority" lines to:
LocalPriority = 005 (5) - local names cache
HostsPriority = 006 (6) - the HOSTS file
DnsPriority = 007 (7) - DNS
NetbtPriority = 008 ( biggrin.gif - NetBT name-resolution, including WINS
5. Reboot for changes to take effect

2. Windows 9x/ME

1. The tweak is essentialy the same as in Windows 2000/XP, just the location in the Registry is slightly different. For a more detailed description see the Windows 2000/XP section above
2. Open the Windows Registry using Regedit, and (after backing up) navigate to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP\ServiceProvider
3. You should see the following settings:
Class=hex:08,00,00,00

LocalPriority=hex:f3,01,00,00
HostsPriority=hex:f4,01,00,00
DnsPriority=hex:d0,07,00,00
NetbtPriority=hex:d1,07,00,00
4. The "priority" lines should be changed to:
LocalPriority=hex:05,00,00,00
HostsPriority=hex:06,00,00,00
DnsPriority=hex:07,00,00,00
NetbtPriority=hex:08,00,00,00
5. Reboot for changes to take effect

3. System.ini IRQ Tweak - Windows 9x/ME ONLY

1. Find your Network Card's IRQ

1. In order to add the entry to your System.ini file, you'd first have to find your NIC's IRQ
2. Right-click on My Computer icon on your Desktop, then left-click on Properties (a shortcut for that would be to press the 'Windows' + 'Pause' keys). Navigate to Device Manager and double-click on Computer. Under "View Resources" you will find a list of IRQs, each with description of the device that's using it. Note the IRQ number used by your Network Adapter

2. Adding the entry to System.ini

1. Once you've found the IRQ of your Network Card, you need to reserve some RAM for its use, by adding an entry to the System.ini file. You can edit the file in any text editor, however the easiest way is to use Windows' built in "System Configuration Editor"
2. Navigate to Start > Run and type sysedit . Find the [386enh] Section in the System.ini file and add Irq[n]=4096 under it, where [n] is the IRQ number of your NIC and 4096 is the amount of RAM you want to reserve in Kbytes. We recommend using 4096, however you can experiment with different values if you want. Save changes in the file, exit and reboot for changes to take effect.
Note: If you choose to try different values, keep in mind that reserving too much RAM for your NIC will decrease the amount of RAM available for applications, while reserving too little might not give the desired effect

3. Additional Thoughts
1. The only negative effect of the System.ini IRQ tweak is that it will reduce the amount of RAM available for running applications a bit, by reserving some specifically for your Network Card's use. The gain in performance usually outweighs the negative effect by far, considering any Computer with 32Mb of RAM or more
2. This tweak may or may not work for you. It is not a documented tweak by Windows
3. Keep in mind that if you add hardware to your system the IRQ of the Network Adapter might change, in which case you will need to modify the setting in System.ini
4. In systems with multiple NICs, you might want to add the setting for both IRQs. Also, you could reserve RAM for other IRQs if you wish, just use common sense and don't forget it reduces the amount of RAM available for running applications
5. If you are using an USB device, it does not have a specific IRQ, however you can try adding the entry using the IRQ of the USB Controller
6. For internal Cable Modems, you'd have to add the entry using the IRQ of your modem, rather than the IRQ of a Network Card



RESULTS WILL VARY
No matter how good your systems may be, they're only as effective as what you put into them.

This is a long one but it works really nicely:

I have used this method with great success and I want to say that I did not create it, but in checking several sources, I find that it is pretty much the standard way to Slipstream the new SP2 that is being posted all over so have fun ...... If you follow the steps to the letter, you shouldn't fail on the very first attempt or the first burn

SlipSTreaming XP SP2

Now that Service Pack 2 (SP2) has been released (RTM 2180) for Windows XP a lot of people have been updating their systems. In fact, a lot have been doing clean installations followed immediately by applying SP2 to eliminate much of the garbage that has collected over the past year of using XP. There really isn't a downside to reformatting and doing a clean install, but if there was one I suppose it could be that the installation of SP2 might be quite time consuming, especially if you do it through Windows Update. However, there is a way to reduce this time expenditure.

If you fall into the category of users that frequently reformat their systems and clean install XP from the CD then creating a slipstreamed version of XP/SP2 can be a huge time saver. You invest the time once and then on subsequent reinstalls you avoid bringing XP up to SP2 speed via Windows Update downloads and installations. You will still have to get the post SP2 updates from Windows Update, but the time saved will still be worthwhile.


There are a few essential items necessary to successfully create the slipstreamed CD. You will need:

The original Windows XP installation CD ROM (Preferably A Corporate Edition)
Note \ it doesn’t matter if you slipstreamed a normal XP version or XP with SP1 (By MS OR Slipstreamed before) one At the end you’ll always come out with a XP\ SP2 CD ROM.
The new CD can be created from either the Home or Professional version of Windows XP. If your computer came with an OEM version of XP it can also be used.

Windows XP Service Pack 2 - It will be necessary to either download SP2 or obtain it on CD. To slipstream, you need the full SP2 which is a 265MB( RTM Version) download from forum or wait till it’s officially on Microsoft site.

CD Creation Software - A burning program for your CD-R or CD-RW drive that allows creating bootable CD's. Unfortunately, while XP does come with the capability to burn CD's built in, the software it uses is not suitable for this task. Since the majority I know seem to be using Nero Burning Rom I've used it in the tutorial, but the instructions can be adapted to other burning software.

ISO Buster - Used to extract the boot loader image file for the Bootable CD. It's a free download (free to try ware)

Building Directories
The first step is to build a directory structure to hold the files that will be used in the CD creation process. It's a simple structure, requiring nothing more than a main folder with three sub-folders. It doesn't matter what names you use for your structure or where you locate them on your hard drive, but most users find drive C the easiest. I used the structure shown below, located on Drive “C:\”. Create whatever folders you are comfortable with or use the ones below if you want to cut and paste commands later in the tutorial. Whatever your choice, it's the relationship between the components that's important, not the naming of the parts.

Main Folder: XP-SS [Located on Drive C]
Sub-Folder: SS-Boot
Sub-Folder: SS-Root
Sub-Folder: SS-XP2
Copying and Extracting Files:

The first step is to insert the Windows XP CD and copy the entire contents into the SS-Root folder or the equivalent folder in your structure.
Before copying the XP CD make sure that the system is set to display all hidden and system files to ensure a complete copy of all files on the CD. The settings to control what files are visible are located in Windows Explorer > Tools > Folder Options > View tab. Make sure [Show hidden files and folders] radio button is selected and [Hide protected operating system files] is unchecked.

The second step is to navigate to where you downloaded the Service pack 2 file. If you downloaded SP2 from Microsoft it should be named xpsp2_en_x86.exe.
The current RTM version named \ xpsp2_RTM_ENU.exe. Copy the file to the XP-SS folder and then rename it to xp-sp2.exe after the copy operation completes.
(If you are using the CD of SP1 the files should already be extracted. Copy them into the XP-SS folder)

Use the Run dialogue shown below to extract the contents of the Service Pack to the previously created SS-XP2 folder.
The Run dialogue box is accessed from [Start] [Run]
The command to begin the extraction is: C:\XP-SS\XP-SP2.EXE -U -X:C:\XP-SS\SS-XP2


Apply the extracted Service Pack 2 to Windows XP in the SS-Root folder using the [Run] dialogue box.

The Run dialogue box is accessed from [Start] [Run]
The command to apply the Service Pack is:
C:\XP-SS\SS-XP2\i386\update\Update.exe -S:C:\XP-SS\SS-Root

The Service Pack 2 is being integrated into the Windows installation folder.
Then:
Successful completion of the integration process.


In order to make the new CD bootable it's necessary to add the file Microsoft Corporation.img to the folder SS-Boot we created earlier. There are a number of ways to do this but the easiest is to use ISO Buster. With the Windows XP CD in your CD drive,( Or Any Bootable Win Xp Version You Might Have) open ISO Buster. Click on Bootable CD in the left pane then right click ( Microsoft Computing.img )( IF Its Not The MS Original CD The Boot File Name Might Any Thing Else The Most Common IS (Arnes Boot Record.img ) so any way we’ll use the (*.img file) in the right pane,
finally right clicking Extract Microsoft Corporation.img file. (Extrack To SS-Boot Folder)


Setting Up The Nero Burning Rom Software:
Depending on how you have Nero configured it may open to a wizard that offers a number of screens to walk you through the process of selecting the type of CD to be created. If the wizard does appear, close it so the main Nero application loads

Select [File] [New...] from the menu bar.

The New Compilation window will open.


In the left column, select “CD-ROM (Boot)” then select the Boot tab

In [Source of Boot Image Data] section, select the [Image File] radio button.

Use the [Browse] button to navigate to the C:\XP-SS\SS-BOOT folder and select MicrosoftCorporation.img file (it ill be asking for A “*.ima File Put the last scroller down on (all files (*.*) ) and choose the *. Img file we extracted earlier (it will work fine).

Make sure the [Enable Expert Settings] box is checked.

Set [Kind of Emulation] to No Emulation

Set [Load Segment of Sectors] to 07C0

Set [Number of Loaded Sectors] to 4 (Failing to set this to 4 will make the CD unbootable)

Once the settings are in place, switch to the ISO tab

ISO Tab

Select them as follows

File Name Length ( Max Of 31 Chars ( ISO Level 2)
Format mode 1
Character Set Iso 9660
And then make sure all the other options are checked

Very Important Note

In the [Relax ISO Restrictions] section it's essential you check the [Do Not Add the ';1' ISO File Version Extension] checkbox or the slipstreamed CD will not be able to boot. If this option is not available on the ISO tab, you must stop now and upgrade to a newer version of Nero - Burning Rom before proceeding.

The Label Tab:

I've never had a problem with any of the slipstreamed CD's I've created by using a Volume Label different from the label that is provided for Windows XP home and Professional version CD's. However, if you prefer, set a Volume Label consistent with the original XP CD. The official labels are listed below.

Set the [Volume Label] field depending on your Windows XP version.

If you have Windows XP Professional enter WXPCCP_EN

If you have Windows XP Home enter WXHCCP_EN

If you have Windows XP Professional OEM enter WXPOEM_EN

If you have Windows XP Home OEM enter WXHOEM_EN


With SP2:

Set the [Volume Label] field depending on your Windows XP version.

If you have Windows XP Professional enter WXPCCP_SP2_EN

If you have Windows XP Home enter WXHCCP_ SP2_EN

If you have Windows XP Professional OEM enter WXPOEM_ SP2_EN

If you have Windows XP Home OEM enter WXHOEM_ SP2_EN

Once the Volume Label has been set, click the [Burn] tab to open the window where the basic burn parameters will be selected.

The Burn Tab:

Make sure the [Write] and [Finalize CD] options are checked in the Action section of the Burn tab and that the proper [Write Speed] has been selected for your burner. The [Write Method] should be set to Disc-At-Once. If you want more than one copy of the CD, enter a new value in [Number of Copies].

Once the burn options have been set, click the [New] button to open the window where the files to be added to the CD will be selected.

Adding The Files To Be Copied:

Clicking the [New] button in the previous step opens the Nero - Burning Rom - ISO1 window that's divided into two distinct sections; ISO1 and File Browser.


In the File Browser window, navigate to SS-Root or your equivalent folder. Click on the first file in the list, hold down the Shift key and click on the last file in the list to select all the files and folders in the C:\XP-SS\SS-Root folder.

Drag and drop the selected files to the ISO1 window.

Press the [Burn] icon on the menu bar to open the Write CD window. the [Burn] icon is the ninth one from the left in the menu bar.

”Important Important Important”:
When you press burn the previous setting window will appear before you press burn button in the right go back to the boot tab and make sure of the following one more time

*Make sure the [Enable Expert Settings] box is checked.

*Set [Kind of Emulation] to No Emulation

*Set [Load Segment of Sectors] to 07C0

*Set [Number of Loaded Sectors] to 4 (Failing to set this to 4 will make the CD unbootable)
Nero will by default disable them so make sure they are set right - its better of you review the rest of the settings as well.

Burning XP:

The Write CD screen allows visual monitoring of the burning process. A few notes are in order relating to insuring a successful burn.

Before you start the burning process close all other programs. Burning a CD can be very processor and memory intensive and there is no sense in taxing the system more than necessary.

If you use a screensaver, disable it before the burning process as an extra precaution. The same applies to your anti virus software if it starts scans or updates automatically.

How long the burning process takes will vary widely depending on your system and the CD burner speed. It may not appear like anything is happening at times, but be patient and more than likely all will be fine.

If the burn does fail, especially because of a buffer problem, reduce the speed of the burn and try again.

You can also do the same procedure on SlipSTreaming XP SP3

Tired of "Windows Explorer" always opening up with My Documents?

You can customize it by changing the properties for the "Windows Explorer" icon and replacing the Target field with:

%SystemRoot%\explorer.exe /n, /e, c:\yourfolder

Procedure used to recover data from a quick-erased CD-RW disc

1. Make a file of exactly the size of the cdrw disc's capacity (650MB in my case).
(this step may not be needed)

2. With Nero I created a new project and added the file to it so that I have the disc filled. I gues you can also fill up the disc with other files.
The reason why I fill the disc is because I want Nero to make a session that uses the entire disc. Like I wrote earlier in this thread I experienced that my CD-Drive refuses to read off the disc beyond the session's boundaries. When you quick-erase a disc there is no session anymore so the drive will not read at all. Burning a new session will overwrite the data and burning only a small session will NOT make the drive read the other data that is still on the disc.
The reason why I used the one big file is so that I could later on recognize which part of the disc was overwritten by this file because this file contained all zeros (0x00).

3. I pressed burn and selected disc-at-once. Then while Nero was burning the leadin I pressed cancel. My CD-Drive finished writing the lead-in and Nero reported an error.
This is what was accomplished however: Now the disc contains a session that says that the used disc size is the complete disc. Nero did not get to writing file because I cancelled it. Good thing because I don't want Nero to write any files because my old data will get overwritten!
I gues it works the same with different writing software. Another method that I used during a test was simply press the reset button of the computer when the burning software was done with writing the lead-in and started with the files.

4. I had to restart the computer after cancelling burning.
With the cdrw disc inserted I saw in "my computer" that windows recognized that the disc was 650MB, clicking on it gave an error. Good so far!

Now with IsoBuster you can extract the sectors from a disc to a file. This is what I did.
I gues that if you have data-recovery software at this point it will be usefull because now (if all went well;)) the CD-Drive WILL read data from the entire disc. Anyway, I used ISO-Buster because the files that I needed to recover where a bit odd for nowadays (.XM, .S3M, .MP3):
In IsoBuster I had to do several steps:

Step 1: Find out from and to which sector the drive will read
By choosing "Sector View" you can look at any given sector.
Here I found out what the first and the last sectors where that are readable. (Hint I used the method for the old game: "Gues a number below 100, I'll tell if it is higher or lower than what you gues")
Step 2: Extract the actual sectors
By choosing "Extract From-To" you can extract any given range of sectors to a file. My disc was a data-disc so I choose the first extraction type "User data, 2048 bytes/block...".

In the end I got a .tao file which was about 650MB. I ran several programs on it to look for files inside a file by searching for file-header-paterns:
1. Multi Ripper 2.80 (for DOS, for the .XM files. It does many other file formats as well (jpg,png, bmp,wav,etc,etc +100). Try google with this query: Multi Ripper 2.80. I still had the file from good old days but I saw several good search results)

2. Winamp for mp3.
Winamp will scan any file when you give it the extension .mp3 and play it as one big song (so I renamed the .tao file to .mp3). I used the discwriter to get a .wav and the Adobe Audition to manually cut and save my songs. I looked at the MP3 file format and it is hard to find an mp3 file in a big file because it has no clear header just a bunch of mpeg-frames in most cases for me . A lot of my files had no ID3v2 or ID3v1 tags... But after a couple of hours I recovered everything.

Finally a list of used stuff:

Software:
- IsoBuster v1.5
- Nero 6.3.0.3
- Multi Ripper 2.80
- WinAmp v5.02
- Windows XP Pro NL (patched up)

Hardware:
- NEC DVDRW ND1300A 1.06

Disc:
- some old 4 speed cdrw

1. Start, Run, 'Regedit'.
2. Press 'Ctrl'+'F' to open find box and type 'Recycle Bin' to search.
3. Change any value data with 'Recycle Bin' to whatever name you want to give it ( ie, like 'Trash Can' or 'Dump' etc).
4. Press F3 to continue searching for 'Recycle Bin' and change wherever you come across 'Recycle Bin' to new its new name.
5. Repeat step 4 until you have finished with searching and changed all values to its new name.
6. Close regedit and hit F5 on desktop to see the new name on screen.

Note: As a good practice, always backup your registry before changing anything although changing 'Recycle Bin' name is a simple tweak and doesnt affect anything else.

Here's a DOS trick for Windows 9x, that will reset (delete) your motherboard's BIOS password (aka CMOS password) without any need to open up your computer to remove the battery or mess with jumpers.

This method can come in very handy in the event you ever lose and forget your BIOS password or if you acquire used computers where the unknown previous owners had BIOS passwords set (in fact, this happened to me long ago—I was given a used computer, but there was no way I could enter the CMOS to make changes). It's important to note here that the password we are talking about is only the one that prevents a user from entering the BIOS setup at bootup, not the one that stops you from getting past the boot.

Normally, at bootup you can press a key (usually the DEL key) to access your BIOS allowing you to view it or make changes. With a password set, there is no way to enter setup. Though a password can provide a basic and very effective level of PC security, losing it can be a real headache if you don't know how to fix the problem.

The MS-DOS command that will makes this trick possible is the DEBUG command (debug itself is a utility—debug.exe—which is located in your Windows Command folder). This is not a command to be taken lightly—in other words, it's not a command to play with! You can cause serious corruption with this command and can end up not being able to even boot your computer! Debug is used to work with binary and executable files and allows you to alter (hex edit) the contents of a file or CPU register right down to the binary and byte level.

To begin debug mode, type debug at a MS-DOS prompt or you can specify a file, i.e., DEBUG FILE.EXE. There is a difference in screen output between the two methods. When you type DEBUG alone, debug responds with a hyphen (-) prompt waiting for you to enter commands. The second method, with a file specified, loads the file into memory and you type all the commands on the line used to start debug. In this tip, we will be writing to the BIOS, so the first method is the one that would be used. All debug commands can be aborted at any time by pressing CTRL/C.

Accessing BIOS with DEBUG
The basic trick will be to fool the BIOS into thinking there is a checksum error, in which case it resets itself, including the password. This is done by invalidating the CMOS and to do that we must know how to access the BIOS and where the checksum value of the CMOS is located so that we can change it. Access to the the BIOS content is via what are known as CMOS Ports and it's Port 70 and 71 that will give us the needed access. On almost all AT motherboards, the checksum is located at hexadecimal address 2e and 2f and filling the address 2e with ff is all you should have to do to invalidate the checksum.

Here's what to do if you ever need to reset the password and have no other method, and you don't want to open up your computer to remove the battery or jumpers.

Note! Do this at your own risk. I can only tell you that it has worked for me more than once and has worked for others as well. But I cannot make any guarantees. When I did this, I took a willing risk. The BIOS was Award Modular BIOS v4.51PG

Restart your computer in MS-DOS mode.


When you get to the C:\> or C:\WINDOWS> prompt, type DEBUG and press Enter.


A hyphen (-) prompt will appear waiting for you to enter commands.


Enter the following commands, pressing Enter after each one. Note: the o is the letter o and stands for OUTPUT.


o 70 2e


o 71 ff


q


After the q command (which stands for QUIT), enter Exit.


Then try to enter your BIOS at bootup. The password prompt should now be gone and you should now have full access to it again. However, you will now be at the default BIOS setttings and may want to change them to your preference. You may also want to have your drives autodetected again.
In closing, I should state that in the case of a lost BIOS password, your first step should always be to contact your manufacturer to see if a backdoor password is available that will allow you to bypass the forgotten password.

There are many sites on the net that list backdoor passwords you can try, but beware that some BIOS that are set up to lock up if you enter the wrong password more than a certain number of times, usually only 3 times!

If an essential Windows file gets whacked by a virus or otherwise corrupted, restore it from the Windows CD. Search the CD for the filename, replacing the last character with an underscore; for example, Notepad.ex_. If it's found, open a command prompt and enter the command EXPAND, followed by the full pathname of the file and of the desired destination: EXPAND D:\SETUP\NOTEPAD.EX_ C:\Windows\NOTEPAD.EXE. If either pathname contains any spaces, surround it with double quotes.

If the file isn't found, search on the unmodified filename. It will probably be inside a CAB file, which Win XP treats as a folder. Simply right-drag and copy the file to the desired location. In other Windows platforms, search for a file matching *.cab that contains the filename. When the search is done, open a command prompt and enter EXTRACT /L followed by the desired location, the full pathname of the CAB file, and the desired filename; for example: EXTRACT /L C:\Windows D:\I386\Driver.cab Notepad.exe. Again, if the destination or CAB file pathname contains spaces, surround it with double quotes.

Ever want a quicker way to shutdown XP without navigating through the start menu, or using a third party shutdown utility Here is a script that will do just that.

Right click the desktop and choose New Shortcut. Copy and paste this script or type it in.

%windir%System32shutdown.exe -s -t 0

Choose Next and name it whatever you like. I name mine OFF. Click Finished. Right click and choose properties and pick a Icon for it if you'd like. I use a wall light switch Icon. I drag mine into my QuickLaunch toolbar for one click shutdown.

Enjoy!

"Take good care of your PC, and it will take good care of you."

It's a nice sentiment, but reality is more like "Take good care of your PC, and it won't crash, lose your data, and cost you your job--probably." Follow these steps to stop PC problems before they stop you.

Your PC's two mortal enemies are heat and moisture. Excess heat accelerates the deterioration of the delicate circuits in your system. The most common causes of overheating are dust and dirt: Clogged vents and CPU cooling fans can keep heat-dissipating air from moving through the case, and even a thin coating of dust or dirt can raise the temperature of your machine's components.

Any grime, but especially the residue of cigarette smoke, can corrode exposed metal contacts. That's why it pays to keep your system clean, inside and out.

If your PC resides in a relatively clean, climate-controlled environment, an annual cleaning should be sufficient. But in most real-world locations, such as dusty offices or shop floors, your system may need a cleaning every few months.

All you need are lint-free wipes, a can of compressed air, a few drops of a mild cleaning solution such as Formula 409 or Simple Green in a bowl of water, and an antistatic wrist strap to protect your system when you clean inside the case.

Think Outside the Box

Before you get started cleaning, check around your PC for anything nearby that could raise its temperature (such as a heating duct or sunshine coming through a window). Also clear away anything that might fall on it or make it dirty, such as a bookcase or houseplants.

Always turn off and unplug the system before you clean any of its components. Never apply any liquid directly to a component. Spray or pour the liquid on a lint-free cloth, and wipe the PC with the cloth.

Clean the case: Wipe the case and clear its ventilation ports of any obstructions. Compressed air is great for this, but don't blow dust into the PC or its optical and floppy drives. Keep all cables firmly attached to their connectors on the case.

Maintain your mechanical mouse: When a nonoptical mouse gets dirty, the pointer moves erratically. Unscrew the ring on the bottom of the unit and remove the ball. Then scrape the accumulated gunk off the two plastic rollers that are set 90 degrees apart inside the ball's housing.

Keep a neat keyboard: Turn the keyboard upside down and shake it to clear the crumbs from between the keys. If that doesn't suffice, blast it (briefly) with compressed air. If your keys stick or your keyboard is really dirty, pry the keys off for easier cleaning. Computer shops have special tools for removing keys, but you can also pop them off by using two pencils with broken tips as jumbo tweezers--just be sure to use a soft touch.

Make your monitor sparkle: Wipe the monitor case and clear its vents of obstructions, without pushing dust into the unit. Clean the screen with a standard glass cleaner and a lint-free cloth. If your monitor has a degauss button (look for a small magnet icon), push it to clear magnetic interference. Many LCDs can be cleaned with isopropyl alcohol; check with your LCD manufacturer. Wipe your LCD lightly: The underlying glass is fragile.

Check your power protection: Reseat the cables plugged into your surge protector. Check the unit's warning indicator, if it has one. Surge protectors may power your PC even after being compromised by a voltage spike (making your system susceptible to a second spike). If your power protector doesn't have a warning indicator and your area suffers frequent power outages, replace it with one that has such an indicator and is UL 1449 certified.

Swipe your CD and DVD media: Gently wipe each disc with a moistened, soft cloth. Use a motion that starts at the center of the disc and then moves outward toward the edge. Never wipe a disc in a circular motion.

Inside the Box

Before cracking open the case, turn off the power and unplug your PC. Ground yourself before you touch anything inside to avoid destroying your circuitry with a static charge. If you don't have a grounding wrist strap, you can ground yourself by touching any of various household objects, such as a water pipe, a lamp, or another grounded electrical device. Be sure to unplug the power cord before you open the case.

Use antistatic wipes to remove dust from inside the case. Avoid touching any circuit-board surfaces. Pay close attention to the power-supply fan, as well as to the case and to CPU fans, if you have them. Spray these components with a blast of compressed air to loosen dust; but to remove the dust rather than rearrange it, you should use a small vacuum.

If your PC is more than four years old, or if the expansion cards plugged into its motherboard are exceptionally dirty, remove each card, clean its contacts with isopropyl alcohol, and reseat it. If your system is less than a couple years old, however, just make sure each card is firmly seated by pressing gently downward on its top edge while not touching its face. Likewise, check your power connectors, EIDE connectors, and other internal cables for a snug fit.

While you have the case open, familiarize yourself with the CMOS battery on the motherboard. For its location, check the motherboard manual. If your PC is more than four or five years old, the CMOS battery may need to be replaced. (A system clock that loses time is one indicator of a dying CMOS battery.)

Look for Trouble

Give your PC a periodic checkup with a good hardware diagnostic utility. Two excellent choices are Sandra Standard from SiSoftware and #1-TuffTest-Lite from #1-PC Diagnostics. Download the free version of Sandra (the full version of the application costs $35) or to download #1-TuffTest-Lite (the fully functional version is $10).

Sandra Standard:
CODE
http://www.pcworld.com/downloads/file_description/0,fid,4005,tk,ur,00.asp


#1-TuffTest-Lite:
CODE
http://www.pcworld.com/downloads/file_description/0,fid,7725,tk,ur,00.asp


Adding and removing system components leaves orphaned entries in the Windows Registry. This can increase the time your PC takes to boot and can slow system performance. Many shareware utilities are designed to clean the Registry.

Windows stores files on a hard drive in rows of contiguous segments, but over time the disk fills and segments become scattered, so they take longer to access. To keep your drive shipshape, run Windows' Disk Defragmenter utility. Click Start, Programs (All Programs in XP), Accessories, System Tools, Disk Defragmenter. If your drive is heavily fragmented, you could boost performance. Defragging may take hours, however. Disable your screen saver and other automatic programs beforehand to keep the defrag from restarting every few minutes.

Disk Defragmenter won't defragment the file on your hard drive that holds overflow data from system memory (also known as the swap file). Since the swap file is frequently accessed, defragmenting it can give your PC more pep. You can defragment your swap file by using a utility such as the SpeedDisk program included with Norton SystemWorks 2004, but there's a way to reset it in Windows.

In Windows XP, right-click My Computer and choose Properties. Click Advanced, and then choose the Settings button under Performance. Click Advanced again and the Change button under Virtual Memory. Select another drive or partition, set your swap file size, and click OK.

If you have only one partition and no way to create a second one, and you have at least 256MB of RAM, disable the swap file rather than moving it: Select "No paging file" in the Virtual Memory settings. If you have trouble booting, start Windows in Safe Mode and re-enable this option.

Hard-Drive Checkup
Windows XP offers a rudimentary evaluation of your hard disk's health with its error-checking utility: Right-click the drive's icon in Windows Explorer and select Properties, Tools, Check Now. (Windows can fix errors and recover bad sectors automatically if you wish.) If the check discovers a few file errors, don't worry, but if it comes up with hundreds of errors, the drive could be in trouble.

To conduct a more thorough examination, download Panterasoft's free HDD Health utility, which monitors hard-drive performance and warns of impending disaster:
CODE
http://www.pcworld.com/downloads/file_description/0,fid,22945,tk,ur,00.asp


The program works only with drives that support S.M.A.R.T technology, but nearly all drives released since 2000 are S.M.A.R.T.-compliant.

Many hardware and software designers humbly assume you want their program running on your PC all the time, so they tell Windows to load the application at startup (hence, the ever-growing string of icons in your system tray). These programs eat up system resources and make hardware conflicts and compatibility problems more likely. To prevent them from launching, just click Start, Run, type "msconfig" and press Enter. The programs listed under the Startup tab are set to start along with Windows. Uncheck the box at the left of each undesirable program to prevent it from starting automatically.

Four Tips for Longer PC Life

1. Keep your PC in a smoke-free environment. Tobacco smoke can damage delicate contacts and circuits.

2. Leave your PC running. Powering up from a cold state is one of the most stressful things you can do to your system's components. If you don't want to leave your PC running all the time, use Windows' Power Management settings to put your machine into hibernation rather than completely shutting down. In Windows XP, right-click the desktop and select Properties. Click the Screen Saver tab and select the Power button. Choose the Hibernate tab to ensure that hibernation is enabled, and then select a time beneath "System hibernates" under the Power Schemes tab. (Note that this option is not available on all PCs.) Computers running older versions of Windows may or may not provide similar power-management features. Look under the Power Management icon (Power Options in Windows 2000) in Control Panel to evaluate your machine's capabilities.

3. Don't leave your monitor running. The best way to extend your display's life is to shut it off when it's not in use.

4. Avoid jostling the PC. Whenever you move your system, even if it's just across the desktop, make sure the machine is shut down and unplugged.

This chart is a list of the most commonly found extensions, what type of file they are and what program if any they are associated with.

.$$$ Temporary file
.$$A OS/2 program file
.$$F OS/2 database file
.$$S OS/2 spreadsheet file
.$D$ OS/2 planner file
.$DB DBASE IV temporary file
.$ED Microsoft C temporary editor file.
.$VM Microsoft Windows temporary file for virtual managers.
._DD Norton disk doctor recovery file.
._DM Nuts n Bolts disk minder recovery file.
.--- File used to backup sys, ini, dat, and other important files from Windows 3.1 and above.
.075 Ventura Publisher 75x75 dpi screen characters
.085 Ventura Publisher 85x85 dpi screen characters
.091 Ventura Publisher 91x91 dpi screen characters
.096 Ventura Publisher 96x96 dpi screen characters
.0B Pagemaker printer font LineDraw enhanced characters.
.1ST File used by some software manufacturers to represent a file that should be read first before starting the program.
.2GR File used in Windows 3.x to display the graphics on older 286 and 386 computers.
.386 Virtual machine support files for the 386 enhanced mode.
.3GR File used in Windows 3.x to display the graphics on later 386, 486 and Pentium computers.
.4SW 4DOS Swap file
A
A ADA program file or UNIX library
.A3W MacroMedia Authorware 3.5 file
.ABK Autobackup file used with Corel Draw 6 and above.
.ABR Brush file for Adobe Photoshop

.ACT Adobe Photoshop Color table file.

.AD After Dark file.
.ADF Adapter description files.
.ADM After Dark screen saver module.
.ADR After Dark randomizer
.AI Adobe Illustrator file.
.AIF Auto Interchange File Format (AIFF) Audio file.
.ANI Windows 95 / Windows 98 / Windows NT animated mouse cursor file.

.ANS ANSI text file.
.ARJ Compressed file can be used with Winzip / Pkzip.

.ASC ASCII Text file
.ASF Sort for Advanced Streaming Format, file developed by Microsoft. The .ASF file is generally a movie player and can be open with software such as Windows Media Player.
.ASP Microsoft FrontPage Active Server Pages. To open these files use your internet browser.
.AVI Windows Movie file.
B
.BAK Backup file used for important windows files usually used with the System.ini and the Win.ini.
.BAS QBasic program and or Visual Basic Module.
.BAT Batch file that can perform tasks for you in dos, like a macro.

.BFC Microsoft Windows 95 / Windows 98 Briefcase file.

.BG Backgammon game file.
.BIN Translation tables for code pages other than the standard 437.
.BK2 Word Perfect for Windows Backup file
.BK3 Word Perfect for Windows Backup file
.BK4 Word Perfect for Windows Backup file
.BK5 Word Perfect for Windows Backup file
.BK6 Word Perfect for Windows Backup file
.BK7 Word Perfect for Windows Backup file
.BK8 Word Perfect for Windows Backup file
.BK9 Word Perfect for Windows Backup file
.BMP Graphical Bit Mapped File used in Windows Paintbrush.

.BNK Sim City Backup

.BPS Microsoft Works Word Processor File.
.BPT Corel Draw Bitmap master file
.BV1 Word Perfect for Windows Backup file
.BV2 Word Perfect for Windows Backup file
.BV3 Word Perfect for Windows Backup file
.BV4 Word Perfect for Windows Backup file
.BV5 Word Perfect for Windows Backup file
.BV6 Word Perfect for Windows Backup file
.BV7 Word Perfect for Windows Backup file
.BV8 Word Perfect for Windows Backup file
.BV9 Word Perfect for Windows Backup file
.BWP BatteryWatch pro file.
C
.C C file used with the C programming language.
.CAB Cabinet file used in Windows 95 and Windows 98 that contains all the windows files and drivers. Information about how to extract a .CAB file can be found on document CH000363.

.CAL Windows Calendar, Supercalculator4 file or Supercal spreadsheet.
.CBL COBOL Program File
.CBT Computer Based Training files.
.CDA CD Audio Player Track.
.CDR Corel Draw Vector file.

.CFB Comptons Multimedia file
.CFG Configuration file
.CFL Corel flowchart file

.CFM Corel FontMaster file / Cold Fusion Template file / Visual dBASE windows customer form
.CHK Scandisk file which is used to back up information that scandisk has found to be bad, found in C root. Because the information within these files are corrupted or reported as bad by Scandisk it is perfectly fine to delete these files, providing you are currently not missing any information. Additional information about scandisk can be found on our scandisk page.

.CL Generic LISP source code.
.CL3 Easy CD Creator layout file.
.CL4 Easy CD Creator layout file.
.CLA Java Class file.
.CLG Disk catalog database
.CLK Corel R.A.V.E. animation file.

.CLL Crick software clicker file
.CLO Cloe image
.CLP Windows Clipboard / Quattro Pro clip art / Clipper 5 compiler script
.CLR WinEdit Colorization word list / 1st reader binary color screen image / PhotStyler color definition
.CLS Visual Basic Class module / C++ Class definition
.CMD Windows Script File also OS/2 command file.
.CMV Corel Movie file.

.CNT Help file (.hlp) Contents (and other file contents)
.CPL Windows 95 / Windows 98 / Windows NT control panel icons.

.CNE Configuration file that builds .COM files.
.CNF Configuration file.
.COB COBOL source code file.
.COD FORTRAN Compiler program code
.COM File that can be executed.
.CPE Fax cover page file
.CPI Code Page Information or Microsoft Windows applet control panel file
.CPP C++ source code file.
.CRD Windows Card file.
.CSV Comma-Separated Variable file. Used primary with databases and spreadsheets / Image file used with CopuShow

.CUR Windows Mouse Cursor.
.CVS Canvas drawing file
.CXX C++ program file or Zortech C++ file
D
.DAT Data file, generally associated or extra data for a program to use.
.DB Paradox database file / Progress database file
.DB2 dBase II file
.DBC Microsoft Visiual Foxpro database container

.DBF dBase II,III,III+,IV / LotusWorks database.
.DBK dBase databse backup / Orcad schematic capture backup file
.DBM Cold Fusion template
.DBO dBase IV compiled program file
.DBQ Paradox memo
.DBT dBase database text file
.DBV Flexfile memo field file
.DBW DataBoss database file
.DBX Database file / DataBeam Image / MS Visual Foxpro Table
.DEV Device Driver
.DIF Document Interchange Format; VisiCalc
.DLL Dynamic Link Library; Allow executable code modules to be loaded on demand, linked at run time, and unloaded when not needed. Windows uses these files to support foreign languages and international/nonstandard keyboards.
.DMO Demo file
.DMP Dump file
.DMD Visual dBASE data module
.DMF Delusion/XTracker Digital Music File
.DMO Demo file
.DMP Dump file
.DMS Compressed archive file
.DOC Microsoft Word Windows/DOS / LotusWorks word processor Windows/DOS /PF S:First Choice Windows/DOS DOT MS Word Windows/DOS.
.DOS Text file and DOS Specification Info
.DOT Microsoft Word Template (Macro).

.DRV Device driver files that attach the hardware to Windows. The different drivers are system, keyboard, pointing devices, sound, printer/ plotter, network, communications adapter.
.DRW Micrografx draw/graph files.
.DT_ Macintosh Data File Fork
.DTA Data file
.DTD SGML Document definition file
.DTF Q&A database
.DTM DigiRekker module
.DTP SecurDesk! Desktop / Timeworks Publisher Text Document / Pressworks Template file
.DUN Dialup Networking exported file.
.DX Document Imaging file / Digital data exchange file

.DXB Drawing interchange binary file
.DXF Autocad drawing interchange format file
.DXN Fujitsu dexNet fax document
.DXR Macromedia director projected movie file
.DYN Lotus 1-2-3 file
.DWG AutoCad Drawing Database
E
.EEB Button bar for Equation Editor in Word Perfect for Windows
.EFT CHIWRITER high resolution screen characters
.EGA EGA screen characters for Ventura Publisher
.ELG Event List text file used with Prosa
.EMS Enhanced Menu System configuration file for PC Tools
.EMU IRMA Workstation for Windows emulation
.ENC ADW Knowledge Ware Encyclopedia
.END Corel Draw Arrow Definition file
.ENG Sprint dictionary file engine
.ENV Word Perfect for Windows environment file.
.EPG Exported PaGe file used with DynaVox
.EPS Encapsulated Postscript, with embedded TIFF preview images.
.EQN Word Perfect for Windows Equation file
.ERD Entity Relation Diagram graphic file
.ERM Entity Relation Diagram model file
.ERR Error log file
.ESH Extended Shell Batch file
.EVT Event file scheduler file for PC Tools
.EX3 Device driver for Harvard graphics 3.0
.EXC QEMM exclude file from optimization file or Rexx program file
.EXE Executable file.
.EXT Extension file for Norton Commander
F
.FDF Adobe Acrobat Forms Document.
.FF AGFA CompuGraphics outline font description.
.FFA Microsoft Fast Find file.

.FFF GUS PnP bank / defFax fax document
.FFL Microsoft Fast Find file / PrintMaster Gold form file

.FFO Microsoft Fast Find file

.FFT DCA/FFT final form text
.FFX Microsoft Fast Find file

.FON Font files to support display and output devices.
.FR3 dBase IV renamed dBase III+ form
.FRF FontMonger Font
.FRG dBase IV uncompiled report
.FRK Compressed zip file used with Apple Macinotsh computers.

.FRM Form file used with various programs / Microsoft Visual Basic Form / FrameMaker document / FrameBuilder file / Oracle executable form / Word Perfect Merge form / DataCAD symbol report file
.FRO dBase IV compiled report / FormFlow file
.FRP PerForm Pro Plus Form
.FRS WordPerfect graphics driver
.FRT FoxPro report file
.FRX Microsoft Visual basic binary form file / FoxPro report file

.FRZ FormFlow file
G
.GIF CompuServe Graphics Interchange Format.
.GR2 286 grabbers that specify which font to use with DOS and Windows.

.GR3 386 grabbers that specify which font to use with DOS and Windows.

.GRA Microsoft Flight simulator graphics file

.GRB Microsoft MS-DOS shell monitor

.GRF Micrografx draw/graph files.
.GRP Microsoft Program Group.

.GZ Compressed Archive file for GZip
H
.HBK Mathcad handbook file
.HDL Procomm Plus alternate download file listing
.HDR Procomm Plus message header
.HDX Help index
.HEX Hex dump
.HFI GEM HP font info
.HGL HP graphics language graphic
.HH C++ Header
.HHH Precompiled Header for Power C
.HHP Help data for Procomm Plus
.HLP Files that contain the Help feature used in windows, cannot be read from DOS.

.HQX Apple Macintosh Binhex text conversion file.

.HSQ Data files associated with the Qaz Trojan.
.HSS Photoshop Hue/Saturation information.
.HST History file / Procomm Plus History File / Host file.
.HTA Hypertext Application (run applications from HTML document).

.HTM Web page files containing HTML or other information found on the Internet.

I

.ICA Citrix file / IOCA graphics file
.ICB Targa Bitmap
.ICC Kodak printer image
.ICE Archive file
.ICL Icon library file
.ICM Image Color Matching profile file
.ICN Microsoft Windows Icon Manager.

.ICO Microsoft Windows Icondraw / Icon.

.ID Disk identification file.
.IDB Microsoft developer intermediate file, used with Microsoft Visual Studio

.IDD MIDI instruments definition
.IDE Integrated Development Environment configuration file
.IDF MIDI instruments drivers file
.IDQ Internet data query file
.IDX Index file
.IFF IFF/LBM (Amiga) used by Computer Eyes frame grabber.
.IMG GEM/IMG (Digital Research) or Ventura Publisher bitmap graphic
.INF Information file that contains customization options.
.INI Files that initialize Windows and Windows apps.
.IPF Installer Script File / OS/2 online documentation for Microsoft source files.
.ISO Compressed file used for an exact duplicate of a CD. .ISO files can be extracted or opened such programs as Win Image that can be found on our shareware download section.

.IWA IBM Writing Assistant Text file.
J
.JAS Graphic
.JPG Graphic commonly used on the Internet and capable of being opened by most modern image editors.
.JS JavaScript file.
.JSB Henter-Joyce Jaws script binary file
.JSD eFAX jet suite document
.JSE JScript encoded script file
.JSH Henter-Joyce Jaws script header file
.JSL PaintShop pro file
.JSM Henter-Joyce Jaws script message file
.JSP Java server page
.JSS Henter-Joyce Jaws script source file
.JT JT fax file
.JTF JPEG tagged Interchange format file
.JTK Sun Java toolkit file
.JTP JetForm file
.JW Justwrite text file
.JWL Justwrite text file library
.JZZ Jazz spreadsheet
K
.KAR Karaoke File used with some audio players.
L
.LGC Program Use Log File (for Windows Program Use Optimization).
.LGO Contains the code for displaying the screen logo.
.LOG Contains the process of certain steps, such as when running scandisk it will usually keep a scandisk.log of what occurred.
.LNK HTML link file used with Microsoft Internet Explorer.

.LWP Lotus Wordpro 96/97 file.
M
.MAC Macintosh macpaint files.
.MBX Microsoft Outlook Express mailbox file.

.MD Compressed Archive file
.MDA Microsoft Access Add-in / Microsoft Access 2 Workgroup.
.MDB Microsoft Access Database / Microsoft Access Application.
.MDE Microsoft Access Database File
.MDF Menu definition file
.MDL Digitrakker Music Module / Rational Rose / Quake model file

.MDM Telix Modem Definition
.MDN Microsoft Access Blank Database Template
.MDP Microsoft Developer Studio Project
.MDT Microsoft Access Add-in Data
.MDW Microsoft Access Workgroup Information
.MDX dBase IV Multiple Index
.MDZ Microsoft Access Wizard Template
.MEB WordPerfect Macro Editor bottom overflow file
.MED WordPerfect Macro Editor delete save / OctaMed tracker module
.MEM WordPerfect Macro Editor macro / Memory File of variables
.MID Midi orchestra files that are used to play with midi sounds built within the sound card.

.MIX Power C object file / Multiplayer Picture file (Microsoft Photodraw 2000 & Microsoft Picture It!) / Command & Conquer Movie/Sound file

.MOD Winoldap files that support (with grabbers) data exchange between DOS apps and Windows apps.
.MOV File used with Quick Time to display a move.

.MP1 MPEG audio stream, layer I
.MP2 MPEG audio stream, layer II
.MP3 MPEG audio stream, layer III; High compressed audio files generally used to record audio tracks and store them in a decent sized file available for playback. See our MP3 page for additional information.

.MPG MPEG movie file.
.MSN Microsoft Network document / Decent mission file

.MTF Windows metafile.
.MTH Derive Math file
.MTM Sound file / MultiTracker music module
.MTV Picture file
.MTW Minitab data file
.MU Quattro menu
.MUL Ultima Online game
.MUP Music publisher file
.MUS Audio file
.MVB Database file / Microsoft multimedia viewer file

.MVE Interplay video file

.MVF Movie stop frame file
.MWP Lotus Wordpro 97 smartmaster file
.MXD ArcInfo map file
.MXT Microsoft C Datafile

.MYD Make your point presentation file.
N
.N64 Nintendo 64 Emulator ROM image.

.NA2 Netscape Communicator address book.
.NAB Novell Groupwise address book

.NAP Napster Music security definition file.
.NDF NeoPlanet Browser file
.NDX Indexed file for most databases.
.NES Nintendo Entertainment system ROM image.

.NIL Norton guide online documentation
.NGF Enterasys Networks NetSight file.

.NHF Nero HFS-CD compilation or a general Nero file
.NIL Norton icon lybrary file.
.NLB Oracle 7 data file
.NLD ATI Radeon video driver file,

.NMI SwordSearcher file.
.NON LucasArts Star Wars - Tie fighter mouse options file.

.NOW Extension commonly used for readme text files.
.NRA Nero Audio CD file.
.NRB Nero CD-ROM boot file.
.NS2 Lotus Notes 2 database,
.NS5 Lotus Notes Domino file,
.NSO NetStudio easy web graphics file.
.NT Windows NT startup file.
.NUM File used with some Software Manufactures to store technical support numbers or other phone numbers, should be readable from DOS and or Windows.
O
.OCA Control Typelib Cache.
.OCX Object Linking and Embedding (OLE) control extension.
.OLB Object library
.OLD Used for backups of important files incase they are improperly updated or deleted.
.OLE Object Linking and Embedding object file
.OLI Olivetti text file
.ORI Original file.
P
.PAB Personal Address Book, file used with Microsoft Outlook.

.PB WinFax Pro phone book file
.PBD PowerBuilder dynamic library / Faxit phone book file
.PBF Turtle Beach Pinnacle bank file
.PBK Microsoft phonebook file

.PBL PowerBuilder library file
.PBM UNIX portable bitmap fuke
.PBR PowerBuilder resource
.PBI Profiler binary input file
.PBM PBM portable bit map graphic
.PBO Profiler binary output
.PBT Profiler binary table
.PCX Microsoft Paint & PC Paintbrush Windows/DOS.

.PDA Bitmap graphic file
.PDB TACT data file
.PDD Adobe PhotoDeluxe Image.

.PDF Adobe Acrobat Reader file which can only be read by Adobe Acrobat (to get file downloaded Adobe Acrobat from our Download Page.

.PDL Borland C++ project description language file.

.PDS Graphic file / Pldasm source code file.
.PDV Paintbrush printer driver.
.PDW Professional Draw document.
.PIC Picture / Viewer Frame Class.
.PIF Program Information File that configures a DOS app to run efficiently in windows.
.PJF Paintjet soft font file.
.PL Harvard palette file / PERL program file

.PL3 Harvard chart palette
.PLB Foxpro library / LogoShow Screensaver file
.PLC Lotus Add-in
.PLD PLD2 source file
.PLG REND386 / AVRIL file
.PLI Oracle 7 data description
.PLL Prelinked library
.PLM DisorderTracker2 module
.PLN WordPerfect spreadsheet file
.PLR Descent Pilot file

.PLS WinAmp MPEG playlist file / DisorderTracker 2 Sample file / Shoutcast file / MYOB data file
.PLT AutoCAD HPGL vector graphic plotter file / Gerber sign-making software file / Betley's CAD Microstation driver configuration for plotting
.PLY Autodesk polygon
.PP Compressed archive file.
.PP4 Picture Publisher.
.PP5 Picture Publisher.
.PPA Power Point Add-in.
.PPB WordPerfect Print preview button bar.
.PPD PostScript Printer description.
.PPF Turtle Beach Pinnacle program file.
.PPI Microsoft PowerPoint graphic file.

.PPL Harvard (now Serif) Polaroid Palette Plus ColorKey Driver.
.PPM PBM Portable Pixelmap Graphic.
.PPO Clipper Preprocessor Output.
.PPP Serif PagePlus Publication.
.PPS Microsoft PowerPoint Slideshow.

.PPT Microsoft PowerPoint presentation.

.PPX Serif PagePlus publication.
.PPZ Microsoft PowerPoint Packaged Presentation.

.PS2 File to support the Micro Channel Architecture in 386 Enhanced mode.
.PSD Adobe Photoshop image file.

.PST Post Office Box file used with Microsoft Outlook usually mailbox.pst unless named otherwise.
.PWA Password agent file.
.PWD Password file.
.PWF ProCite Workforms
.PWL Password file used in Windows 95 and Windows 98 is stored in the Windows directory.
.PWP Photoworks image file
.PWZ PowerPoint wizard
Q
.QIC Windows backup file
.QT Quick Time Movie File
.QXD Quark Express file
.QXL Quark Xpress element library
.QXT Quark Xpress template file
R
.RA Real Audio file.
.RAM Real Audio file.
.RAR Compressed file similar to .ZIP uses different compression program to extract. See our recommended download page for a program that can be used to extract .RAR files.
.RAS File extension used for raster graphic files.

.RD1 Descent registered level file

.RD3 Ray Dream designer graphics file / CorelDraw 3D file
.RD4 Ray Dream designer graphics file
.RD5 Ray Dream designer graphics file
.RDB TrueVector rules database
.RDF Resource description framework file / Chromeleon report definition
.RDL Descent registered level file / RadioDestiny radio stream

.RDX Reflex data file
.REC Sound file used with Windows Sound Recorder.

.RLE Microsoft Windows Run Length Encoded (Run Length Encoded (bitmap format) file that contains the actual screen logo).
.RMI Microsoft RMID sound file.
.RPB Automotive diagnostic file.
.RPD Rapidfile database
.RPM Red Hat Package Manager / RealMedia Player file.

.RPT Various Report file
.RTF Rich Text Format file
.RWZ Microsoft Outlook rules wizard file

S
.SAV File that usually contains saved information such as a saved game.
.SC2 Maps used in Sim City 2000.

.SCP Dialup Networking script file.
.SCR Source files for the .INI files, or sometimes may be used as screen savers.
.SD Sound Designer I audio file
.SD2 Sound Designer II flattened file / Sound Designer II data fork file / SAS database file
.SDA StarOffice drawing file / SoftCuisine data archive
.SDC StarOffice spreadsheet
.SDD StarOffice presentation
.SDF Standard data format file / Schedule data file / System file format / Autodesk mapguide spatial data file
.SDK Roland S-series floppy disk image
.SDL SmartDraw library
.SDN Small archive
.SDR SmartDraw drawing
.SDS StarOffice chart file / Raw MIDI sample dump standard file
.SDT SmartDraw template
.SDV Semicolon divided value file
.SDW Sun Microsystems StarOffice file document file similar to the Microsoft Office .DOC file.
.SDX MIDI sample dump standard files compacted by SDX
.SEA Short for Self Extracting Archive. Compressed file used with the Macintosh.
.SH Archive file
.SH3 Harvard (now Serif) presentation file
.SHB Corel Background file
.SHG Hotspot Editor Hypergraphic
.SHK Macintosh Compressed Archive file
.SHM WordPerfect Shell Macro
.SHP 3D Studio Shapes File / other 3D related file
.SHR Archive file
.SHS Shell scrap object file
.SHW Corel presentation / WordPerfect Slide Show / Show File
.SLK Multiplan file.
.SND Sound Clip file / Raw unsigned PCM data / AKAI MPC-series sample / NeXT sound / Macintosh sound resource file
.SNG MIDI song
.SNM Netscape Mail
.SNO SNOBOL program file
.SNP Snapview snapshot file
.SUM Summary file.
.SWF Macromedia Flash file.
.SWP Extension used for the Windows Swap File usually Win386.Swp. This file is required by Windows and generally can grow very large in size sometimes up to several hundred megs. This file is used to swap information between currently running programs and or memory. If this file is deleted from the computer Windows will be unable to load and will need to be reinstalled.
.SYS System and peripheral drivers.
T
.TDF Trace Definition File used with OS/2
.TGA Targa file
.TIF Tag Image Format that includes most 24-bit color.
.TLB Remote automation truelib files / OLE type library / Visual C++ type library
.TLD Tellix file
.TLE NASA two-line element set
.TLP Microsoft project timeline fie

.TLT Trellix web design file
.TLX Trellix data file
.TMP Temporary files.
.TRM Windows Terminal.
.TXT Text file that can be read from windows of from DOS by using the Edit, Type, or Edlin.
U
.UNI MikMod (UniMod) format file / Forcast Pro data file
.UNK Unknown file type, sometimes used when a file is received that cannot be identified
.UNX Text file generally associated with UNIX.

.URL File used with some browsers such as Internet Explorer linking you to different web pages. Internet Shortcut.
V
.VB VBScript file
.VBA vBase file
.VBD ActiveX file
.VBE VBScript encoded script file
.VBG Visual Basic group project file
.VBK VisualCADD backup file
.VBL User license control file
.VBP Visual Basic project file
.VBR Remote automation registration files
.VBS Microsoft Visual Basic Script file for quick programs and in some cases can be used as a virus file.
.VBW Visual Basic project workplace
.VBX Visual Basic extension file
.VBZ Wizard launch file
.VC VisiCalc Spreadsheet file.
.VCD VisualCADD Drawing file.
.VCE Natural MicroSystems voice file.
.VCF vCard File / Vevi Configuration file.
.VCS Microsoft Outlook vCalander file.

.VCT FoxPro class library.
.VCW Microsoft Visual C++ workbench information file.

.VCX FoxPro class library.
.VDA Targa bitmap
.VDD Short for Virtual Device Driver. Additional information can be found here.

.VDO VDOScript file
.VDX No such file extension - Likely you meant to .vxd
.VM Virtual Machine / Virtual Memory file.
.VMM Virtual Machine (Memory Manager) file.
.VMF Ventura font characteristics file / FaxWorks audio file
.VMH
.VS2 Roland-Bass transfer file.
.VSD Visio drawing.
.VSL GetRight download list file.
.VSS Visio stencil.
.VST Video Template / Truevision Vista graphic / Targa Bitmap/
.VSW Visio workspace file.
.VXD Windows system driver file allowing a driver direct access to the Windows Kernel, allowing for low level access to hardware.
W
.WAB Microsoft Outlook Express personal address book.

.WAD File first found in IdSoftware games such as DOOM, Quake, as well as most new games similar to these.
.WAV Sound files in Windows open and played with sound recorder.

.WB1 Quattro Pro Notebook
.WB2 Quattro Pro Spreadsheet
.WBF Microsoft Windows Batch File

.WBK Wordperfect document / workbook
.WBT Winbatch batch file
.WCD Wordperfect macro token list
.WCM Microsoft Works data transmission file / Wordperfect Macro

.WCP Wordperfect product information description
.WDB Microsoft Works database

.WEB Web source code file
.WFM dBASE Form object
.WFN CorelDRAW font
.WFX Winfax data file
.WG1 Lotus 1-2-3 worksheet

.WG2 Lotus 1-2-3 for OS/2 worksheet

.WID Ventura publisher width table
.WIN Foxpro - dBASE window file
.WIZ Microsoft Publisher page wizard

.WK1 Lotus 1-2-3 all versions / LotusWorks spreadsheet.

.WK3 Lotus 1-2-3 for Windows /Lotus 1-2-3 Rel.3.

.WKS Lotus 1-2-3 Rel lA,2.0,2.01, also file used with Microsoft Works.

.WLG Dr. Watson log file.

.WMA Windows Media Audio file.
.WMF Windows Metafile. Also see WMF dictionary definition.

.WMZ Windows Media Player theme package file.
.WPD WordPerfect Windows/DOS.
.WPG WordPerfect Graphical files Windows/DOS.
.WPM WordPerfect Macro file.
.WPS MS Works word processor Windows/DOS.
.WRI Windows Write.
.WRK Lotus 1-2 31.0,1.01,1.1/ Symphony 1,1.01.
.WRI Symphony l.1,1.2,2 / Microsoft Write file.
X
.XIF Wang image file / Xerox image file
.XLB Microsoft Excel File.

.XLS Microsoft Excel File.

.XM Sound file / Fast tracker 2 extended module
.XML Extensible markup language file.
.XNK Exchange shortcut
.XOT Xnetech job output file
.XPM X picsmap graphic
.XQT SuperCalc macro sheet
.XRF Cross Reference
.XR1 Epic MegaGames Xargon File

.XSL XML Style sheet
.XSM LEXIS-NEXIS tracker
.XTB LocoScript external translation table
.XWD X Windows dump file

.XWF Yamaha XG Works file
.XXE Xxencoded file
.XY XYWrite text file
.XY3 XYWrite text file
.XY4 XYwrite IV document
.XYP XYwrite III plus document
.XYW XYwrite Windows 4.0 document
Y
.Y Amiga YABBA compressed file archive
.Y01 Paradox index file
.Y02 Paradox index file
.Y03 Paradox index file
.Y04 Paradox index file
.Y05 Paradox index file
.Y06 Paradox index file
.Y07 Paradox index file
.Y08 Paradox index file
.Y09 Paradox index file
.YUV Yuv graphics file
.YZ YAC compressed file archive.
Z
.Z Compressed file that can hold thousands of files. To extract all the files Pkzip or Winzip will need to be used. UNIX / Linux users use the compress / uncompress command to extract these files.
.ZIP Compressed file that can hold thousands of files. To extract all the files Pkzip or Winzip will need to be used.