You can use this new program from microsoft. This program will help you to remove malicious software—including Blaster, Sasser, and Mydoom. Microsoft Windows Malicious Software Removal Tool works with Windows Vista, Windows XP, Windows 2000, and Windows Server 2003 .

You can install it and then scan your computer, when scan is complete it will displays a report describing the outcome, including which, if any, malicious software was detected and removed. The tool creates a log file named mrt.log in the %WINDIR%\debug folder.

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