Is there anykind of bootable diagnostic C/D that will find problems that wont let you install WinXP PRO?
There are numerous bootable diagnostic programs out there. However, none will simply tell you that a particular problem it finds is the reason that Windows won't load. You would have to determine that. What kind of problem are you having? Usually if Windows fails to load it's either a hard drive or memory issue, or a SATA driver issue if you're using a SATA hard disk. We use PC Certify's Professional Diagnostic Tool Kit, and it serves our purposes. However, there are others, and you should do a web search and check them out to find the best that suits your needs.