While avast! didn't come close to receiving "product of the year" AV-Comparatives did award it a bronze medal for fast on-demand scanning. I can't figure that one out; my own results show it scanning significantly slower than average. Both ICSA Labs and West Coast Labs certified avast!'s ability to detect malware, and it received the VB 100% award from Virus Bulletin in eight of the last ten Windows-based tests. Overall, the lab results are positive, though not overwhelming.—
I have Microsoft Security Essentials loaded too.
Seems to slow down my start up considerably.