It seems from other responses I got that my faulty power supply had burnt out my hard drive. I had a 233 Mhz computer with an AT power supply and it always made a little click noise when I turned the computer on. (I have not been using it I gave it to someone else). They gave it back to me and said the hard drive has cluster errors and scandisk freezes after 59% and windows won't start up. It had a 3 gb Hard drive in it and I had another hard drive that I had had in it before and they both worked, so I put the other one in it and the format failed and it wouldn't go through the scandisk either. It seemed to have made a louder than usual pop noise when I turned it on. From what other people have told me it must have been a hardware issue, probably the power supply. I have just changed the AT power supply with another and am waiting for a hard drive to put into it. This power supply looks cleaner than the other one which was very dusty and was in a computer I believe worked and wasn't used much. I am just hoping this problem doesn't arise again. I am just wondering if the computer is getting old, or if the power supply is the only problem and the rest of the mother board is ok. I don't understand electricity much and don't quite understand how a power supply that still technically works can surge and burn out a hard drive like that. Is there something more simplistic about the AT power supply compared to the newer ATX that causes you to be able to audibly hear the hard drive click on or unseat from rest when they power up because my new one doesn't make this noise when it's turned on? thank you very much, Robert Kupferer _________________________________________________________________ Get MSN 8 and help protect your children with advanced parental controls. http://join.msn.com/?page=features/parental PCBUILD's List Owners: Bob Wright<[log in to unmask]> Drew Dunn<[log in to unmask]>