Did you format the HDD before the install? I would imagine it would add some time formatting a 500G drive. (Not 10 hours though..) Have you ever used the restore cd before? I have recently encountered an issue where the restore cd that came with a certain pc took about 10 hours to install XP (overnight)... but when I used my own actual copy of XP it only took about 45 minutes. Also, tho it isn't highly likely, it could be your cd drive. Saw something similar to that on a recent server install.... a CDROM drive that had worked fine at the office went bad when we installed the server at our COLO. Try installing something else, like a game or something. If the drive works fine on that, I would suspect the actual CD.... Let me know what you find and I will try to help you troubleshoot