USB SYSTEM LOCK

BOOT LOCK

This lock will allow you to use your USB stick as a key to boot into windows.If someone tries to start the computer without your USB stick, it will display boot errors. Before we begin let us tell you that playing with the BIOS and files of your computer may result in you not being able to boot into your partition;so continue at your own risk!

Now that we have absolved ourselves of all guilty,let's begin.

Things you need:A 64MB or larger sized USB stick,windows recovery disk.(Just in case)

Steps:

1) Unhide hidden and protected files: goto Tools>options>view, check show hidden files and unchecked hide protected system files.

2)From the driver where Windows is installed(normally C:\), copy the files boot.ini,ntdlr and NTDETECT.COM to your USB Stick.

3)Now,we need to go into your BIOS,so restart the computer and keep jabbing[F8] as soon as the computer starts.

4)Once in the BIOS,enable USB Drive as the first boot device.You might have to enable USB Legacy support on older BIOSes.

5)Restart your computer if all goes well you should be able to lg into windows.If not,then unplug the USB stick,return to the BIOS and change the first Boot device to your hard disk and repeat the steps above.

6)Once your are logged into Windows drive and rename boot.ini to boot.bak.

7)To check if you have setup everything correctly,eject your USB stick and reboot the computer.You should get error messages on the screen such as "Invalid Boot.ini" or "Windows could not start".

8)In case Windows does not load,use yours windows recovery disk by following the steps mentioned at http://tinyurl.com/s9sd2.

The other way

For the less brave-hearted,  instead of preventing Windows from booting you can choose to just lock your computer with your USB stick.

USB system Lock

A freeware program,USB system lock Works flawlessly while locking and unlocking your computer.When you install USB System Lock, it detects your USB stick  and creates a digital key on it.This key is used by the program to authenticate the user and log into the computer.

Strangely,the program is not included in the start-up list by default.

to add it there,you need it to drag agent from the USB system lock entry under all programs to the start up folder in the same menu.If you happen to accidentally delete the key from your USB stick while working on the protected computer you can reassign a key using start>programs>USB system lock>Key Disk Generator.

My Lock 2.0

This program takes USB-based computer locking to whole new level.You can look access to not only your PC but the keyboard,CD Drive and even access to safe mode.You can also set a particular time for the computer to automatically lock itself.What is most interesting about the phrase so that you can use it log into the computer even without the stick plugged in

HOW TO FIX CORRUPTED XP FILES

How to fix corrupted windows file is very easy.Following these following steps

Requirement:
1. Windows XP CD

Now, follow this steps:
1. Place the xp cd in your cd/dvd drive
2. Go to start
3. Run
4. Type sfc /scannow

 It should all load and fix all your corrupted file on win XP.Hope this method can fix your corrupted
xp system files.

 If this Does Not Work Then You Need to Format The Computer as there would be Viruses in the
PC and you can can Also Use the antivirus if the Possible otherwise format the PC .

RESTARTING WINDOWS WITHOUT RESTARTING YOUR PC

A modern PC with vista Home Edition takes about one and a half minute to boot.An older machine with XP is about the same.that,s 30 seconds for the PC itself (the BIOS) to boot up, plus a minute for the Windows OS to boot.


Sometimes,you need to reboot Windows(e.g When installing new software),but there is no need to restart BIOS, too.However,the default is to reboot both.(That's called doing a "cold boot", rather than a "warm boot"). There's a trick that works on the both XP and vista to get it to do a warm boot instead, thus saving you 30 seconds/cycle.


The trick is to hold down the SHIFT key when invoking the restart.


Windows Vista:Select start,then hover over the right arrow that is to the right of the padlock icon until the pop-up menu appears that contains "restart" as one of it's  choices.Hold down the SHIFT key while clicking on the "restart" choice.


Windows XP:select start.Select "Shut down...".Change the drop-down combo box under "What do you want the computer to do?" to "Restart".Hold down the SHIFT key while clicking on the "OK"

GET BACK HIDDEN DRIVE AGAIN IN MY COMPUTER

Start->Run->Type cmd and enter.

In command prompt type disk part and hit enter.

Then type list volume and hit enter.
       It displays drive details.

Drive letter which you want to get back.
If you want to get back volume D,type select volume D and hit enter.
       It appears select volume.

After that type assign letter D and hit enter.

Restart computer once.

HIDE DRIVE IN MY COMPUTER

Start->Run->type cmd and hit enter.

In command prompt type disk part and hit enter.

Then type list volume and hit enter.
        It will display the drive details.

Drive letter which you want to hide
If you want to hide volume D, type select volume D and hit enter.
       It appears select volume.

After that type remove letter D and hit enter.

Restart your computer once.

PC FILE EXTENSIONS

.$$$ Temporary file
.$$A OS/2 program file
.$$F OS/2 database file
.$$S OS/2 spreadsheet file
. 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 Battery Watch 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.

CHAT WITH YOUR FRIENDS USING MS-DOS

•  All you need is your friends IP address and your Command Prompt.
•  Open your notepad and write this code as it is.

@echo off:
A
Cls
echo MESSENGER
set /p n=User:
set /p m=Message:
net send %n% %m%
Pause
Goto A3.

•  Now save this as "Messenger.Bat”.
•  Drag this file (.bat file)over to Command Prompt and press enter!
•  You would then see some thing like this:

MESSENGER
User:

•  After "User” type the IP address of the computer you want to contact.
•  Before you press "Enter” it should look like this:

MESSENGER

User: IP_Address User: IP_Address

Message: Hi, How are you ? Message: Hi, How are you?

•  Now all you need to do is press "Enter”, and start chatting.

This Trick Works In the LAN connection Only.
 And may Not support some latest operating Systems like Windows 7 and Windows Vista.

WILL WINDOWS WORK CONTINUOUSLY FOR MORE THAN 49.7 DAYS?

Here is a bit of information, which may surprise you all.Windows crashes automatically if you don't switch off the machine for 49.7 days.Microsoft accept this do you know this why?
In windows the virtual machine manager(VMM) is responsible for creation, execution,monitoring and termination of virtual machines.This VMM, which is a 32 bit, protected mode operating systems entity,provides a number of system services at chip level.One of the services is "Get-System-Time".

 Register with the time in milliseconds since windows started on that machine.This services is accurate to 1 ms. EAX is a 32 bit register in Intel 386 processor on wards.
So the maximum number of milliseconds it can hold is (232)-1=4294967.295 seconds=71582.79 minutes=1193 hours=49.7 days. So after 49.7 days the EAX reset to zero.Most of the drivers use this time services to keep track of the timeout of various services they provide. So after 49.7 days the drivers cannot use the get-system-time function of VMM and they taking the operating system along with.

ACCESS BLOCKED WEBSITE WITHOUT USING ANY SOFTWARE

Click start->Run. In run box type cmd and hit enter.

Now  command prompt window will appear.

In command prompt type PING website address and hit enter.
Eg: ping websitename.com 

IP address will appear in command prompt.

After that type the particular  IP address in the address box.

FORMAT PEN-DRIVE USING COMMAND PROMPT

Insert pen-drive into your PC.

Find the drive letter of a pen-drive.

Now click on Start ->Run.

In Run box, type cmd and hit enter.

Now cmd will appear, in this window format "pen-drive letter" . Eg:format g.

Hit Enter twice.

CHANGE BACKGROUND COLOR OF FACEBOOK

FIREFOX.

Make sure that you are logged in Firefox web browser.

Install Grease monkey, click here to install Grease monkey add-on

After installation,restart your Firefox once

Now go to Facebook color change user script page.

Click  on Install button which is located in the right of the page

Click on Install.

Now go to Tools-> Grease monkey-> user scripts commands->customize Facebook colors

INTERNET

View Your IP Address

First, what is an IP address? The technical definition goes something like this: "An IP (Internet

Protocol) address is a 32-binary digit number that identifies each sender or receiver of

information that is sent across the Internet. When you request an HTML page or send e-mail, the

Internet Protocol part of TCP/IP includes your IP address in the information."

To find out what your IP address is, click on START | RUN. Type in "WINIPCFG" without the quotes.

PC TRICKS

See How Long Windows Has Been Running

Click on START | PROGRAMS | ACCESSORIES | SYSTEM TOOLS | SYSTEM INFORMATION.
In the window that pops up, look at "Uptime" on the right side. You'll see many days, hours,
minutes, and seconds Windows has been running since your last restart.

PC TRICKS

Delete Your Temporary Files

Unfortunately, many Windows files leave unnecessary files in the TEMP directory from time to
time.
These files may be unneeded data files, files that the program has simply "forgotten" about, or
files created and not deleted due to a program's abnormal termination.
You can free up some room on your hard drive by visiting the WINDOWS\TEMP directory in your
Windows Explorer and delete the files there.
Be Careful! Definitely DO NOT delete files that were created today, or yesterday... files created
several weeks ago are usually safe to delete. If you are not sure which files to delete then do not worry about using this "trick" unless your drive space gets too low. 

PC TRICKS

Shrink Your Toolbar Size

Is your toolbar taking up too much room? Customize it! You can shrink the size of the buttons,
and if you know what each button does, you can remove the text labels underneath the buttons.
Click on the "View" menu, choose "Toolbars", and then select "Customize". On the "Customize
Toolbar" dialog box that follows, you can add or remove icons (buttons) to and from the toolbar,
shrink the size of the icons, and change how text is displayed near the icons, if at all.
When you are done modifying the toolbar, press "Close" to exit this dialog box.

PC TRICKS

Opening A Program With Keystrokes

Did you know you can assign certain keystrokes to open a program?
This way you won't have to stop what you're doing and double click on it with your mouse.
Right click on the chosen program on your desktop and select PROPERTIES. Click on the
Shortcut Tab. In the text box labeled SHORTCUT KEY, type your chosen letter. Ctrl + Alt will
automatically be added. Click OK. Now hit CTRL + ALT + letter.

FACE CODES FOR FACEBOOK CHAT

[[171108522930776]] - Troll face 
[[129627277060203]] - Poker face 
[[100002752520227]] - Okay 
[[164413893600463]] - Me Gusta 
[[189637151067601]] - Lol face 
[[106043532814443]] - Y U NO 
[[218595638164996]] - Yao Ming Face Meme 
[[100002727365206]] - Challenge Accepted

CHANGING BACKGROUND FOR FACEBOOK

GOOGLE CHROME

FACEBOOK BACKGROUND CHANGER

 chrome.google.com/webstore/detail/facebook-background-                        chang/emnlfbokmiehpnhgdjlmedakkchfldmj

• go to this address.
• In right of that page there will be a ADD TO CHROME button click that button then FACEBOOK 
• BACKGROUND changer will be added to your chrome
• Then,you can change the BACKGROUND.

Also you can change color by  using FACEBOOK  COLOR changer.

chrome.google.com/webstore/detail/facebook-color-chang/emnlfbokmiehpnhgdjlmedakkchfldmj

• go to this address.
• In right of that page there will be a ADD TO CHROME button click that button then FACEBOOK 
• COLOR changer will be added to your chrome
• Then,you can change the COLOR.

TRICKS

FACEBOOK COLOR CODES

• Make colorful chat with your friends.
• paste the following codes in your chat area and press enter.

[[107015582669715]] = A

[[116067591741123]] = B

[[115602405121532]] = C

[[112542438763744]] = D

[[115430438474268]] = E

[[109225112442557]] = F

[[111532845537326]] = G

[[111356865552629]] = H

[[109294689102123]] = I

[[126362660720793]] = J

[[116651741681944]] = K

[[115807951764667]] = L

[[106596672714242]] = M

[[108634132504932]] = N

[[116564658357124]] = O

[[111669128857397]] = P

[[107061805996548]] = Q

[[106699962703083]] = R

[[115927268419031]] = S

[[112669162092780]] = T

[[108983579135532]] = U

[[107023745999320]] = V

[[106678406038354]] = W

[[116740548336581]] = X

[[112416755444217]] = Y

[[165724910215]]       = Z

Eg:

        for hai = [[111356865552629]]  [[107015582669715]] [[109294689102123]]