I built a PC for my mum months ago, but it hasn't been used for a couple of months. It was working fine before but after I connected it all up again yesterday it kept resetting itself during the boot process. It would normally get to the 'Windows XP' screen with the scrolling bar at the bottom, indicating that windows was booting, but then reset itself. It even got to the WinXP desktop with everything loaded before again rebooting. I was just wondering what the most common cause for this constant rebooting would be; maybe faulty memory?