[JoeProBono]

I use AVIRA.

Hated AVG.

http://www.free-av.com/en/download/1/avira_antivir_personal__free_antivirus.html

[TomGuy]

I changed from AVG to Avast! about a year ago.

AVG got to be bloated and created conflicts with other programs.

Avast! Home version has been great. I do have some of their options turned off, however, that can slow my system.

[Tainan]

I will also recommend AVIRA...its free and its very good.

Update it every morning when you log on to the intarweb. Right click its little thing on your bottom right screen and click on the update...works great.