Yeah, some virusses can screw up your BIOS and stuff like that. I have norton on 24/7 and I have no probs with Maya. Antivirus software can be really useful, but there is nothing like a good reformat to really keep your PC at it's healthiest and fastest. The pain is reinstalling everything though!
Take a glance at my <a href="https://forums.simplymaya.com/showthread.php?s=&threadid=9428"><b>Porsche 959</b></a> WIP