im using xp pro. i beleive i have an undeletable file i placed on my desktop by accident that i really wish to delete. it came from an .iso from the game unreal tournament 2004. anywho the file is simply called setup.exe. when you try and delete it it says its being used by another program. the file appears to be dos based because when you click it it briefly brings up a dos window before a command line error. so the file appears to be useless. i booted into safemode using msconfig to have the minimum processes running and tried to delete it and it still says being used by another program. while in safe mode i tried to end even more processes while trying to delete it and was unsuccessful. its not spyware or a trojan. i will do anything to delete this file, even if it brings damage or needs me to delete whatever is using it. please help.