I can't understand why you would get that when trying to move or rename a file unless it's a .dll system file which alot of programs in xp use. If I'm reading you correctly the DivX file contains .dll files which you must have inorder for your operating system to run so it's important not to remove nor rename them. There are other ways but I would not do it. If you get that error 9 times out of 10 thats why. Even if you install a game you got at the store this can happen. Becareful of what you remove or you'll be back on here asking how to restore your system.