BitDefender Online Scanner is a fully functional antivirus product.
Take the Kaspersky Challenge: See what your current antivirus is missing.
RootkitRevealer is an advanced rootkit detection utility.
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.
NGenFix is a Norman program utility that may be used to detect and remove specific malicious software (malware).
Trend Micro HouseCall is an application for checking whether your computer has been infected by viruses, spyware or other malware ( grayware ).