Although I vote for AVG too, I also suggest Avast! (Hey, it is Pirate Day). I use i with everything off except the standard and web shield, and it works great. AVG is nice, but frankly, I don't know how good they are anymore after they went semi-pay (I went to Avast after that and haven't went back... yet; they do have free still). So it's your call. AVG obviously got more response, but really, I think it is down to user comfort with each to define a choice.