Well, here are a few thoughts of a few virus scanners I've been trying for the last few weeks.
Not a fan of Kaprensky, seemed sluggish, and while using the trial version, while it was updating, it seems to stop actively protecting my system.. Or at least, that is what Windows thoughts. Cant say for sure if the paid version is like that. Or was some bug ..
AVG I liked, but, I flipped over because it gave me a few false reports. But, I did use it for sometime and seemed to be just fine. And, I'll probably flip back to it soon.
Currently using/trying Avira Antivir, I like it, but, not overly fond of the idea that it keeps 'popping' up with me to buy the suite. Not obtrusive mind you, just seems on update/boots. So far though, I like it..
Bit Defender - Used that one for awhile, I liked it..but, again, false reports. But, I did like the fact that it had a 'gaming' mode that would cause the virus scanner to become 'less' active in favor of performance.
Nortons, no way hose.. Nice and pretty looking, but, to much garbage after you try and uninstall it. Plus, it's a pain to uninstall..long process.. And, it annoys me because novices on PC would have a difficult time uninstalling it..
Keyoke