GetMicrosoft Malicious Software Removal Tool Free. Itgives more ammunition to the system against threats and malicious content. This anti-spyware software is designed by Microsoft to scan and check for malicious software in the system. The threats and malware are then removed and a full report is displayed at the end of the scan. The software requires a weekly update. This software is not a replacement for any antivirus product. It just scans and removes the infections by a particular prevalent malicious item which may include Sasser, Mydoom and Blaster. This removal tool will ask you to perform the scanning function every now and then to keep the computer clean and free from infections.