Personally, I try to stay away fro AVG.
FWIW I agree with Broni regarding AVG. M$E is good, but I don't like the fact that you cannot disable automatic definition updates and it also creates too many restore points thru it's updates (also cannot be disabled unless you disable system restore...at least not in Win 7). I prefer Avast FREE AV & MalwareBytes Pro (registered) version. It costs US $24.95 (money well spent, IMHO)
and includes on demand malware scanning, real-time malware scanning and blocking; automatic malicious website identification and blocking; a scheduler for software and malware signature database updates; a Flash Scan mode which scans volatile memory and autorun objects; and priority customer support
. MBAM works nicely alongside most popular AV's & FW's (unlike SpyBot's tea-timer, although I'm basing that only on what I've read since I've never used SpyBot)
Edited by Union_Thug, 21 December 2010 - 02:17 AM.