What program was it you were trying to remove? You say it didn't work trying to use Add/Remove Programs, so what exactly was the message that popped up when you tried? In Windows XP, when manually deleting folders means the Add/Remove Programs window can't find the uninstaller for an entry, there is the option to manually remove the entry yourself. Whatever you do, it will be quite messy. A bit more information may be useful to help you.