Windows Defender is a free program that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. It features Real-Time Protection, a monitoring system that recommends actions against spyware when it's detected and minimizes interruptions and helps you stay productive. read more »
The Microsoft Windows Malicious Software Removal Tool checks computers running Windows Vista, 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. read more »
Get full service for your PC. Online scan by Microsoft.
Windows Live Safety Center is a new, free service designed to help ensure the health of your PC.
Check for and remove viruses and spyware
Improve your PC's performance
Get rid of junk on your hard disk read more »