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
Avast Pro Antivirus
A trial version app for Windows, by AVAST
Norman Security Suite
Protect your PC against a range of threats
Avira Small Business Security Suite
Professional IT security for small businesses
Avira Antivirus Premium
A solid and easy-to-use antivirus package