I'm using WinXP SP1 on a 3.2Ghz hyperthreading Intel P4. I've decided to move away from Norton Internet Security Suite to a free or less expensive AV and Firewall. I theoretically get McAfee free with my Comcast ISP, but I started going through their download and activation procedure and had a number of problems. Which is what got me thinking about AVG, but I figured I'd ask for other folks opinions before I settle on one. Thanks in advance for your time.