Statistcally, Norton is much superior to McAfee (as of now, at least). Norton does indeed provide stable protection, and I personally have NEVER had a problem with Norton. Even now, I continue to use and beta test for norton/symantec. Regardless, the 2008 versions of Norton Products do use a LOT less memory that the previous products. On the other hand, McAfee does hog up much more memory than any other antivirus software (from my experience). You seem to also be having a good experience with them, so I wouldn't say you need to switch. In the event that you do believe you have a virus or spyware that Norton isn't picking up (which if you don't visit stupid sites, and you know what sites to visit, you should be fine). But godforbid you do download something stupid, and Norton does not see it, you can always double check that using online scanners. I know BitDefender has a very nice one, and it also has an on-demand antivirus (free version of the full BitDefender AntiVirus, with no protection, but scan + removal features). So, after getting all this stuff down in text, I'm going to sum up my answer by saying stick with norton. Plus, unless you got it free, you could be dishing out another $50 for a whole new antivirus software, when you already have a good one! Edit: Also, AMEN to what Jib said! AVG is NOT, I repeat NOT the choice to go. My experience: I am a pretty harcore gamer, so speed and a "clean" computer is definitely a must. I play a popular Massively Multiplayer Online Role Playing Game (MMORPG) called "World of Warcraft." And I know, a lot of people excluding the 10Million people who do actually player it call those people "nerds" and think the game is stupid. Well, that's beside my point, but a year and a half ago, AVG AntiVirus (All versions) basically detected a virus in the main coding to run the game. So, when I used AVG (at that time) Me and the other million players that used AVG went with what it said, stupidly, and got rid of the file. And the sad part is, the file wasn't even a virus, it's what we call, False-Positives. I thought this was dumb on AVG's part, and shows their poor coding.