Avast

Avast is an antivirus program. Avast Free Antivirus is the freeware version of Avast! antivirus software available to Microsoft windows. Avast! Antivirus is a widely used antivirus program, with 130 million users worldwide as of September 2010.

Downalod Avast 

                                                  Features

             

  It has many features like

1-          Anti  spyware capabilities

2-         Anti  root kit capabilities

3-         Script blocker

4-         Web Shield

5-          Mail Shield
6-          File system shield

7-         P2P shield

8-          Network shield

9          Behavior shield

10    Automatic updates