IMHO McAfee is the worst popular AV out there, I always remove it if it is on a PC I work on. I've seen it let more viruses though than any other AV program. I recommend using AVG [link I provided earlier]. The Free ed. works perfectly fine, but I do suggest if you are impressed to purchase the 2 yr license for 33 bucks which gives you AG 7 pro. I don't work for them, but I do believe in supporting a good product.