Comodo Internet Security Pro - "free"
Features

Antivirus, Anti-Spyware, Anti-Rootkit & Bot protection
Defends your PC from Internet attacks
Detects and eliminates viruses
Prevents malware from being installed
Auto Sandbox Technology™
Easy to install, configure and use
Free to both business and home users
60 Days of FREE GeekBuddy live remote PC support


Try Pro FREE for 1 year
Download
http://download.comodo.com/cis/download/installs/1000/partners/cispro_1year_installer_1221.exe