I used to have norton and it sucks the ram up so bad. I just got Trenmicro and its ways better, and way cheaper.(also voted a best buy by Cnet) my computer is so much faster, and it has found stuff that norton never found. Notron and Macafee don't have any new inovations at all and they charge too much for what you get. instead of creating new software they just add programs that keep sucking the ram out of your computers system.