Ok well I have this Microsoft Licensing disk that I got from my dads work, and it says on it: MultiLanguage Microsoft Windows Vista Business Service Pack 1 (used for all editions of Vista) June 2008 Systems Windows Client: Business And I've been trying to boot off it, but it just wont do it. And yes, all my boot order is correct, and there are absolutely no scratches on it. When I look at the disk inside XP, I can explore it and i find a few files, like setup.exe, etc., but if i try to open it, it says "spinstall.exe is not a valid Win32 application." I also tried booting off it on 2 different machines, and still nothing happened. Thanks in advance, Sam.