Hi every1, new to the forum. Thanks in advance for any input. I built a machine about 15 months ago and everything has been running fine for the most part. However, lately I have noticed that when booting up, immediately when the login screen for xp shows up, the computer reboots. Sometimes, following the reboot, I get a message from windows that the computer did not shut down properly, sometimes not. It just happened 10 min ago again so it is pretty recent. Any suggestions?