I've been using ZoneAlarm with Antivirus for what must be almost a year now , and I have had no problems with it at all. It uses ComputerAssosiate's antivirus engine, and has detected two 'viruses so far,' they were just websites that had mal intentioned scripts in them and it stopped them, so all in all, I feel it's a good a/v. To top it all off, you know you have one of the best (in my opinion) firewalls around to add those extra layers of security. I'm also a believer in the motto that the best form of virus protection is the user themselves, though I can see how in certain situations, this is not always possible.