i have question about something i really should know already, but i am getting a used PC for free that is beaten down and slow due to programs, virus (possibly) missing/corrupted files, and just junk. i am looking to completely reinstall windows XP, and wipe out EVERYTHING. i have installed Windows XP before, but always end up with some/most of the old files still on there. what am i doing wrong? i want everything that is on there gone, and a complete fresh install of windows XP. any help is appreciated. thanks.