I have a strange problem with a machine that reboots itself after a few minutes but once it has rebooted it runs Ok. The various error messages that pop up suggest a driver problem. one even identified a Realtek sound driver problem. I updated some drivers off the Microsoft update site and downloaded the latest driver from Realtek, which I know has worked well on other Win XP machines. If the machine rebooted repeatedly I might look at hardware problems but as it only reboots once it has me puzzled. The only thing that has changed on the machine recently was that I reformatted the drive and reloaded all the software. Any ideas anyone?