oh yea i used avast on my xp pro x64 edition because there was none other that could work on the x64 edition. but where i have the choice i rather stick with a reputable name instead of avast. i never even knew about avast until i googled in search of an x64 compatible antivirus. ok so i have 2 standalone desktops but i am only concerned for the 32bit one at the moment.