Antivir is good but all failed to that recent fun.exe virus.
Antivir can't catch it. Nod32 still can't catch it. I have it now and it's fully updated.
I am not sure about other virus scanners but from what i checked only Kaspersky catches it. Anyway Kaspersky really sucks coz it bothers you too much when its running and asking for guidance and using lot of system resources than NOD32.
I am using NOD32 now since its so low on system resources but i found several times it fails to catch some viruses. I am not sure how it gets the Vb100 award always even more than Kaspersky.