i have a clean install of xp pro. my xp and avg dont get along at all. i also noticed when i downloaded the service packs, the avg icon replaced the regular icon in the add/remove list. it also kept freezing up and was kinda jerky/stop n go action. much like a hard drive on the fritz. after i got rid of avg and its leftovers, xp runs great. i now use norton 2003 with no problems. i have used avg on other versions of windows (98, me) with no problems whatsoever.