File protection feature or something like that. A dialog box came up and said that there are unrecognized xp files that can cause unstability problems. Insert your XP service pack 1 cd. I tried to insert the cd and it says wrong one. So I pressed cancel and it said do you want to keep these bad files. I had no choice but to say yes. When I put my Xp cd in it wanted me to install again? Does anyone have any infomation about that type of error? My system seems to be working ok. Should I reinstall XP service pack one, or just wait and see what happens in the futrue? Also, is there a xp diagnostic that I can run to see if my system files are ok. I recently added a partition withe partition magic and it moved and resized my three existing partitions to make the forth one, but that was yesterday. thanks for any help in this matter.