I upgraded my hard drive and used the old h/d on another computer before i got xp loaded on the new h/d... Now if it does boot from the disc, it takes almost an hour just to get thrue the first part. then i dies right as you start the next part. Ive gotten arrore reports, to it only wanting to boot from the bad xp load i just put in.. I am at my witts end.. Please help me.. Jr.

I'm having trouble following you.
You have 2 hard drives in one computer, both with XP installed?

And now it's taking an hour to boot to the original hard drive?

You could try and run some hard drive diagnostics.
SysChat - Downloads (Freeware Utilities) - Ultimate Boot CD

Trying to follow S & M's lead...if two drives in same computer...old one moved to slave position ....could be a matter of incorect jumper sttings on the harddrive itself!
Western Digitals will sometimes act like this if the jumper is not set properly!