I have XP SP2 on a HP a3410 desktop. I normally just log-off instead of powering down after each use, since I have 3 kids that also use the computer. If I do any updates that require a restart, I have been experiencing this problem lately. The computer reboots normally up to the XP logo, then it powers off itself briefly, then reboots again. This keeps going on and on. I can reboot succesfully into safe mode, and I have tried to restore to a past point, but nothing seems to fix it. I have the Media Center Edition preinstalled, and I have read that I can't really do a repair, since the disks I have created (it didn't come with recovery disks) will restore it to factory specs, and I'll loose all data. Can I do a backup in safe mode, then do a restore? When I start using the computer by logging on, it has run properly with no problems. It's only this restart or cold start issue. Thanks for any help.