I apologize if this is a duplicate in advance.
I need to reinstall windows XP since it has become very slow and I suspected loaded with worms and root kits. I have uploaded all the files I need to dropbox and am not worried about reinstalling programs. However I haven't got the original disk or license key, is it possible to simply 'wipe' the computer and leave just the OS?
P.S. I know XP is horribly outdated but I haven't got the means to update to a newer OS or computer at the moment.