I recently built a computer for someone using a Chaintech VNF-250, Athlon 64 2800+ and a Hitachi SATA 80GB. After about two weeks the harddrive started exhibiting problems. Upon bootup, Windows XP could not start because of missing files. I tried to backup as much as possible and reinstall. During format, the install crapped out (I had last seen progress past 50%) and indicated there was a problem with the harddrive. I went to Fry's and picked up a new 80GB Seagate drive. It had the same error. I have tried a new SATA connector and new SATA power connector on a different molex. The problem still persists. Any ideas?