Sorry, I apologize. I thought I was set up to get email notifications on any replies to my thread, so thus my lack of a response until now.
Have you ran some memory tests? If different hard drives are having problems in the same machine, then it's not the hard drives.
There's really no easy way to check the motherboard, so if it was me who was having the problems, I would check the memory next. If the memory comes out fine and the problems still occur, it might be time to scrap the motherboard.
I did not run mem. tests as I left this a barebones system, anticipating another drive failure. I assumed running mem. tests would mean the system booted normally and therefore might not show a problem with mem. I wanted to use this system on a wireless system to back up my vast CD collection, (I leave them in the car and on my porch, but keep the originals safe).
Just a passing thought: you aren't using Norton GoBack, are you?
One of the last things I did was install my old, 05'? Norton Systemworks before I started having problems again.
Western Digital sent me a 300gb in lieu of the 250gb I returned to them. It formatted, and I walked out of the room at 97% done, came back a few minutes later at looked at a black screen telling me system wasn't found or something like that. Tried to reboot the XP Pro installation disk with no better results, so couldn't reformat it again.
WD replaced that drive with another 300gb. I just booted the Win XP CD, started a format, saw it was for drive "F:", rebooted and formatted it at "C:" this time. I forgot to delte the partition, so watched. At 100% a message came on screen telling me the drive won't take a format and might be damaged. It allowed me to restart the format, I deleted the partition this time and restarted the format. Hoping for the best right now.
This PC is of Win 98' vintage, worked for a time with the 250gb before regularly scheduled failures.