Lately, I have seen a comparison chart, which AV program is better. The winner was Kaspersky Laboratory (russian scientists). The name is Kaspersky antivirus program, Why? The answer:

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...Antivirus database 8 times a day

Kaspersky Labs provides antivirus database updates eight times a day. During outbreaks, urgent updates for deflecting new threats are available within 1-2 hours after the malware is detected.

Spam signature updates every 2 hours

Spammers never sleep and neither does our Linguistic Lab. We offer updates of spam signatures every 2 hours. The linguistic kernel supporting our anti-spam product line is updated regularly to counter new spammer techniques.....
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You can get more info here hit me.

I combine it with Ad-Aware. The results are always the same. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> I have clean and working machine. <img src="/ubbthreads/images/graemlins/up.gif" alt="" />

"Endure. In enduring, grow strong." -Githzerai adage.