Avast!

 Versions 2012

The latest stable Windows version is 7.0, released worldwide on February 23, 2012. The Avast! product range comprises the following:

Avast! Free Antivirus 7.0 — freeware for personal, non-commercial use only

Avast! Pro Antivirus 7.0 — shareware for both personal and commercial use

Avast! Internet Security 7.0 — shareware for both personal and commercial use

Kaspersky Anti-Virus 2012  

Essential Protection

Kaspersky Anti-Virus 2012 is the backbone of your PC’s security system, delivering real-time protection from the latest malware and viruses.
 It works behind the scenes with intelligent scanning and small, frequent updates, while proactively protecting you from known and emerging Internet threats.

Enjoy essential protection that won’t slow you down with Kaspersky Anti-Virus 2012!

 AVG Anti-Virus 2012

 AVG Anti-Virus FREE, high quality basic protection
or AVG Internet Security 2012 Compatible with widows xp, windows 7,
Features & Benefits AVG Anti-Virus FREE AVG Internet Security