Microsoft Releases Updated Malicious Software Removal Tool
The Microsoft Windows Malicious Software Removal Tool checks computers running Windows XP, Windows 2000, and Windows Server 2003 for infections by specific, prevalent malicious software - including Blaster, Sasser, and MyDoom - and helps remove any infection found.

Don't forget to check Microsoft's Windows Updates page frequently to stay on top of the latest security patches and updates.

Recovering from Viruses, Worms, and Trojan Horses
Unfortunately, many subscribers are victims of viruses, worms, or Trojan horses. If your computer gets infected with malicious code, there are steps you can take to recover. This article from U.S. Department of Homeland Security should prove helpful.