Free virus protection and optimization
A free and safe companion: Avast Free Antivirus
Free and comprehensive protection suite
Free and simple antivirus software from Microsoft
AIM Fix
Removes all known AIM viruses
HitmanPro
Think you've got a virus? Get a second opinion
VirusTotal Uploader
Downloadable antivirus tool from VirusTotal
Avira Free System Speedup
A second opinion for your antivirus