Microsoft Windows Malicious Software Removal Tool checks windows computers for and helps remove infections by specific, prevalent malicious software—including Blaster, Sasser, and Mydoom. When the detection and removal process is complete, the tool displays a report describing the outcome, including which, if any, malicious software was detected and removed.
This tool scans your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps to remove the infection if it is found. Microsoft will release an updated version of this tool on the second Tuesday of each month. Microsoft Malicious Software Removal Tool is Amazing Anti-Spyware tool for Windows PC.
This tool checks computer for malicious softwares but its not a replacement for an antivirus. You still have you use anti-virus product to protect your computer.