I'm a NOD32 supporter as well. However, all the builds (2.5x.xx) have an annoying problem (dunno if it's a bug). Every once in a while, the PC starts to stall for no reason and when I open the task manager, i see nod32krn utilizing 99% CPU. People say that if I turn of Advanced Heuristics, I will get rid of the problem (and they are right), but it will bring down the effectiveness of the virus shield significantly. So i wouldn't do that. This is not frequent. You might not experience this issue, not even once a day. It's like couple of times a week. I think maybe this happens when it finds certain kinds of files and tries to scan them. Other than that, this is the most trusted and fastest AV software I've ever used. Mind you that I haven't used Kaspersky, but almost all the other main AV software. I was going to try Kaspersky when I was reading the earlier posts. But after reading ClauSoft's last post, I'm not going to try it. Because a rare performance hit would be acceptable compared to living in a overall slower computer environment.