Hi I made a new poll for know what think the people about the antiviruses heuristics. I personally think the following: NOD32 is the best detecting unknown viruses type Worm (not irc), Boot viruses, and old encrypted viruses. McAfee is excellent catching P2P, Irc worms, and malware like hacker tools, etc. Dr.Web heuristic is also excellent. Dr.Web without doubt is the best detecting worms, viruses and trojans type BAT. Best Regards.