text: four processors in windows xp pro? i have windows xp pro running on an old alr revolution quad6 server which has 4 processors on it.  right now windows only see/uses 2 of them.  is there a way to get windows to see/use theother 2 processors? i do not think windows can control that many by itself. i would try searching for a build of linux that is designed specifically for multiple processor use. linux takes a bit of a more advanced user than windows does but judging by the type of computer you have i'd have to guess that you are up to the challenge.