Anti Virus Redux

Free is as free does. (Or is that free DOS?)
Heres the top 3 for me at this time.
AVG has tanked my old win boxes (yes lots of those) so I jumped ship to Avast. Avast is good... but even it seems heavy laden on ye old stuff.
So now I am going with Avira, yes it has a popup every time it updates, mild adware, but hey it works....

Tally,
Old boxes Avira. New boxes Avast. Avg? Its soupy for me now.. accept for some old 7.0 I am still running.

http://www.avira.com
http://www.avast.com
http://free.avg.com

zzz1. Make sure you get free not demo of above.
zzz2. Avira Popup fix? http://www.wikihow.com/Remove-the-Popup-Ads-in-Avira-Antivir