Im working on a machine for a friend, HP Pavilion 700. It had an 80gb WD drive as master and a 120gb seagate as slave. Every now and then it would make a real high pitched noise they said then crash. Well I hooked it up let it run, messed around with it and it would run just real slow. Then it made the high pitched noise twice then bsod. So I assumed it was the hdd, I tried to format the seagate and got disk is corrupt cannot format or some other error and then a bsod. So I figured Id give the 80gb another shot, formatted installed and got into windows once. Upon reboot I attempt to get into windows and bsod. One of the bsod error codes was about memory being bad so this is still an option. Now I threw in a spare hdd I had and so far no problems, except when first turning the machine on it takes about 5 minutes to detect ide drives.