ok got everything working ok, evidently my other two westernDigital Hd's werent compatible with the new 64bit system? or maybe they were corrupted enough to where it wouldnt run on my new system....hrmmm think it needs more investigating being that i can run them error free on my Hp. But anyways i bought a brand spankin new WD 7200.. been wantin a faster HD anyways butik just finished installing WinXP and everything is workin fine. Thanks everybody for the help!