I have a strange situation. I am working on a friend's computer. He originally had Win98 and started getting the message to insert a bootable disk. I installed a new hard drive, added memory (not related) and installed WinXP, clean install. I still got the error. Finally, I decided to replace the motherboard battery to see if it would help. It seemed to work for several months, even though he doesn't restart his machine much. Today, he restarted and got the error. I picked up the computer and brought it home and haven't had the error after 3 or 4 startups. I did move his machine off of his power strip initially but still got the error. Could this be a power issue in his house? Thanks.