I have it working on xp but just repaired another lap top and its saying I must have .net framework 2.0. I deleted my 3.5 and tried to download it but it says it already exists then I noticed that its not supported by Vista. Not the end of the world if I can't use it just thought I'd give it a shot. Its working fine on xp and windows 7 or atleast its downloaded on windows 7, havent actually tuned with it yet. I'm on the beta version btw.