I have a system that keeps looping back to the startup screen. I tried to boot via safe mode, last known good config, start windows normally to no avail. I have booted from the cd rom with the xp cd and tried the repair, nothing. I tried the bootconfig command and nothing. Does anyone have any suggestions besided reformatting the hard drive.
I had this happen to a machine I was working on. Sounds like a viral thing. Anyway you could pull this hd, set the jumper to slave, and scan it with anti-virus on another machine? As always, check all connections first. Or try Ubuntu and see if you can mount the drive and see anything amiss.