It all started with trying to do a defrag on an AMD xp2100 machine with 1 gig ram running XP Pro. The defrag report listed nine system files, Windows\p, a, g, e, f, i, l, s, and y as being in use and unable to defrag. They are all identical in size (1.50 gig) and have the identical date (date of last computer boot) and range from having 4 fragments to 40,000 fragments. Obviously a problem. Also due to being in use I cannot move, delete, or copy them. In looking at another XP computer these files do not exist. Has anyone seen this before and have any idea what is creating them, and more importantly how to get rid of them. Oh and to make matters worse after doing some reboots etc, there are now 10 of them C:\windows\0 has appeared!