Pay for NOD32.
Avira is supposedly the best free anti virus program you can get. The only negative is that it has an advert pop up when it updates but apparently you can get around that.
I'm using a paid for kaspersky on my laptop.
+1
AVG is now too much bloat ware and a resource hog. NOD32 is clean, reliable and does not flag so many false positives.
+1 never had any problems on my computerI use AVG and Zonealarm and never had any problems.