Hey guys, I got a Seagate 80 GIG HD and when i formated my bros comp and went to install the winxp the xp disk didnt work, so I took my HD out and put it into his comp and it said , " No Operating System Found " then when I put it back into my computer it wouldnt work... the S.M.A.R.T said it was BAD and I dont know WHY or what happend.. help please