The Microsoft Windows Malicious Software Removal Tool helps to remove
malicious software from your computers that are running Windows 8,
Windows Server 2012, Windows 7, Windows Vista, Windows Server 2003,
Windows Server 2008, or Windows XP.
Microsoft releases a new version of the Microsoft Malicious Software
Removal Tool every month. After you download the tool, the tool runs one
time to check your computer for infection by specific prevalent
malicious software (including Blaster, Sasser, and Mydoom) and helps
remove any infection it finds.