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Virus Profile: W32/Sality.gen.z!91676CD65696

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 11/16/2012
Date Added: 11/16/2012
Origin: Unknown
Length: 962536
Type: Virus
Subtype: Win32
DAT Required: 6898
Removal Instructions
   
 
 
   

Description

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Viruses are self-replicating. They are often spread by a network or by transmission to a removable medium such as a removable disk, writable CD, or USB drive. Viruses may also spread by infecting files on a network file system or a file system that is shared by another computer.

   

Virus Characteristics

This is a Virus

File PropertiesProperty Values
McAfee DetectionW32/Sality.gen.z
Length962536 bytes
MD591676cd65696df7583f07be4ee8dc6a3
SHA16ff276b12b4e829cf98f10bf0e18f6238da9a874


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareVirus.Win32.Tanatos!IK
ahnlabWin32/Kashu.B
avastWin32:Kukacka
AVG (GriSoft)win32/tanatos.m
aviraW32/Sality.y
KasperskyVirus.Win32.Sality.GeN
BitDefenderWin32.Sality.OG
clamavW32.Sality-56
Dr.WebWin32.Sector.5
F-ProtW32/Sality.ak
FortiNetW32/Sality.AA
Microsoftvirus:win32/sality.am
SymantecW32.Sality.AE
EsetWin32/Sality.NAR
normanW32/Sality.an
pandaW32/Sality.ak
risingWin32.KUKU.ky
SophosW32/Sality-AM
Trend MicroPE_SALITY.EN
vba32Virus.Win32.Sality.kaka
V-BusterWin32.Sality.AP.Gen
Vet (Computer Associates)Win32/Sality.AA

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Adds or modifies system policies. Could be used to prevent the or detour the use of common system tools.High
Attempts to write instructions that detour an existing code path of a previously loaded process.High
Attempts to load and execute remote code in a previously loaded processMedium
Modifies Windows explorer file browser's Advanced settings. Sometimes used by malware to make executable files look like documents.Medium
Modifies Windows firewall settings.Medium
Enumerates many system files and directories.Low
Enumerates process listLow


McAfee ScansScan Detections
McAfee BetaW32/Sality.gen.z
McAfee SupportedW32/Sality.gen.z



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

6ff276b12b4e829cf98f10bf0e18f6238da9a874

The following files have been added to the system:

  • %PROGRAMFILES%\msn\tmp4352$.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\data.xml
  • %WINDIR%\LastGood\INF\oem6.PNF
  • %TEMP%\IXP000.TMP\TMP4351$.TMP
  • %PROGRAMFILES%\MSN\MSNCoreFiles\pisynctw.exe
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\viewer.htm
  • %WINDIR%\LastGood\INF\oem6.inf
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\splash.gif
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\1033\piorgres.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\images\prgemp.gif
  • %WINDIR%\SYSTEM32\msnphoto.scr
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\ActiveXControl.htm
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\pi.inf
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\pidav.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\fngrprnt.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\msvcr71.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\piview.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\unicows.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\msvcr71.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\messengerData.xml
  • %PROGRAMFILES%\MSN\MSNCoreFiles\pidav.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\scripts\Slideshow1.js
  • %PROGRAMFILES%\MSN\MSNCoreFiles\pisync.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\config.xml
  • %PROGRAMFILES%\MSN\MSNCoreFiles\pibase.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\images\prggrn.gif
  • %PROGRAMFILES%\msn\msncorefiles\tmp4352$.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\startup.js
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\images\mega.gif
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\pibase.dll
  • %PROGRAMFILES%\tmp4352$.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\locale\slideshow.xml
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\piorg.dll

The following files have been changed:

  • %PROGRAMFILES%\winrar\winrar.exe
  • %WINDIR%\system.ini
  • %WINDIR%\SYSTEM32\catroot2\dberr.txt
  • %WINDIR%\SYSTEM32\notepad.exe
  • %WINDIR%\setupapi.log
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\WINWORD.EXE
  • %WINDIR%\SYSTEM32\catroot\{f750e6c3-38ee-11d1-85e5-00c04fc295ee}\timestamp
  • %PROGRAMFILES%\Microsoft Office\OFFICE11\EXCEL.EXE

The following files were temporarily written to disk then later removed:

  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\mediactr.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET2A.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\images\SET2D.tmp
  • %TEMP%\IXP000.TMP\pi.inf
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\locale\SET31.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\MW770.CAT
  • %PROGRAMFILES%\msn\msncorefiles\pi\set23.tmp
  • %TEMP%\IXP000.TMP\piorg.dll
  • %TEMP%\IXP000.TMP\W95INF16.DLL
  • %TEMP%\IXP000.TMP\fngrprnt.dll
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\IMS.CAT
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET13.tmp
  • %TEMP%\IXP000.TMP\msvcr71.dll
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\sp1.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET26.tmp
  • %TEMP%\IXP000.TMP\unicows.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET29.tmp
  • %TEMP%\winqorkrv.exe
  • %TEMP%\IXP000.TMP\pidav.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET16.tmp
  • %TEMP%\IXP000.TMP\viewer.htm
  • %WINDIR%\INF\oem6.inf
  • %TEMP%\IXP000.TMP\piorgres.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\SET34.tmp
  • %TEMP%\IXP000.TMP\active~1.htm
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\nt5inf.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\scripts\SET30.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\KB893803v2_wxp.cat
  • %TEMP%\IXP000.TMP\slides~1.xml
  • %TEMP%\IXP000.TMP\splash.gif
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\images\SET2E.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\NT5IIS.CAT
  • %TEMP%\IXP000.TMP\prggrn.gif
  • %TEMP%\IXP000.TMP\config.xml
  • %TEMP%\IXP000.TMP\pibase.dll
  • %TEMP%\IXP000.TMP\PI.txt
  • %WINDIR%\SYSTEM32\SET12.tmp
  • %TEMP%\IXP000.TMP\piview.dll
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\HPCRDP.CAT
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET25.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\SET36.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\nt5.cat
  • %TEMP%\IXP000.TMP\pisync.dll
  • %PROGRAMFILES%\MSN\MSNCoreFiles\SET33.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\IASNT4.CAT
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET15.tmp
  • %TEMP%\IXP000.TMP\mega.gif
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\ntprint.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\1033\SET32.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET28.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET27.tmp
  • %TEMP%\IXP000.TMP\prgemp.gif
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\OEMBIOS.CAT
  • %TEMP%\IXP000.TMP\slides~1.js
  • %PROGRAMFILES%\msn\msncorefiles\pi\set24.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\msmsgs.cat
  • %TEMP%\IXP000.TMP\W95INF32.DLL
  • %TEMP%\IXP000.TMP\startup.js
  • %TEMP%\IXP000.TMP\messen~1.xml
  • %PROGRAMFILES%\MSN\MSNCoreFiles\SET38.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\images\SET2F.tmp
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET14.tmp
  • %TEMP%\IXP000.TMP\ADVPACK.DLL
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\fp4.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET2B.tmp
  • %TEMP%\IXP000.TMP\data.xml
  • %TEMP%\IXP000.TMP\pisynctw.exe
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\mstsweb.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\SET35.tmp
  • %WINDIR%\SYSTEM32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\TempDir\tabletpc.cat
  • %PROGRAMFILES%\MSN\MSNCoreFiles\PI\SET2C.tmp
  • %TEMP%\IXP000.TMP\msnphoto.scr
  • %PROGRAMFILES%\MSN\MSNCoreFiles\SET37.tmp

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\PHOTOPICKER\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\SCREENSAVER\
  • HKEY_LOCAL_MACHINE\SYSTEM\LASTKNOWNGOODRECOVERY\LASTGOOD\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_0 = 3432392762
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_1 = 1306501940
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_10 = 237724371
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_11 = 405047413
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_12 = 1401289650
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_2 = 3935477981
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_3 = 1637115544
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_4 = 2326510685
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_5 = 2159251216
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_6 = 253380043
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_7 = 3334278148
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_8 = 1116966097
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A1_9 = 1845891600
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_0 = 5517
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_1 = 1768779981
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_10 = 507900274
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_11 = 2276678730
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_12 = 4045448233
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_2 = 3537557012
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_3 = [private subnet]
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_4 = 2780137953
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_5 = 253944725
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_6 = 2022722736
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_7 = 3791497577
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_8 = 1265316812
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A2_9 = 3034092811
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_0 = 17000001
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_1 = 1752039936
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_10 = 524717259
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_11 = 2259691658
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_12 = 4028880205
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_2 = 3554258627
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_3 = [private subnet]
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_4 = 2763454277
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_5 = 237081348
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_6 = 2039693255
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_7 = 3774798726
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_8 = 1248347209
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A3_9 = 3051085832
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_0 = 0
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_1 = 1768776769
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_10 = 507898506
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_11 = 2276675275
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_12 = 4045452044
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_2 = 3537553538
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_3 = [private subnet]
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_4 = 2780139780
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_5 = 253949253
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_6 = 2022726022
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_7 = 3791502791
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_8 = 1265312264
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\A4_9 = 3034089033
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\[private subnet] = 0
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\-1514827516 = 35
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\1768776769 = 73
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\2022726022 = 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
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\253949253 = 379
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\-503464505 = 78C3AA8EF3156860486479ABC542995C72AB9905B9252BA8A2FAFA90A79E3D948CF9DD0AB06645E3C85E4859B6934F919EFD701775331FFCCAB64B81[private subnet]E64CBDEA53C9099BEF14EBB7B64B9AE17639306F355B071BECA8062244B095528209ECB9B34B7921[private subnet]CC4F3EAF0C1DEC00AF8A7D4B9043A30D56564
  • HKEY_CURRENT_USER\SOFTWARE\ADMINISTRATOR914\-993627007\-757413758 = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\HIDDEN = 2
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\PHOTOPICKER\MSNGROUPSDAVURL = www.msnusers.com
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\PHOTOPICKER\MSNPIURL = http://go.microsoft.com/fwlink/pi/pi9.asp
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\PHOTOPICKER\MSNSKU_LOCALE = 1033
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\PHOTOPICKER\SLIDESHOWINSTALL = %PROGRAMFILES%\MSN\MSNCoreFiles\PI\
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\PICTURE IT!\SCREENSAVER\INSTALLPATH = %PROGRAMFILES%\MSN\MSNCoreFiles
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\POLICIES\SYSTEM\ENABLELUA = 0
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SHAREDACCESS\PARAMETERS\FIREWALLPOLICY\STANDARDPROFILE\AUTHORIZEDAPPLICATIONS\LIST\%TEMP%\6FF276B12B4E829CF98F10BF0E18F6238DA9A874 = %TEMP%\6ff276b12b4e829cf98f10bf0e18f6238da9a874:*:Enabled:ipsec
  • HKEY_LOCAL_MACHINE\SYSTEM\LASTKNOWNGOODRECOVERY\LASTGOOD\INF/OEM6.INF = 1
  • HKEY_LOCAL_MACHINE\SYSTEM\LASTKNOWNGOODRECOVERY\LASTGOOD\INF/OEM6.PNF = 1

   

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.