I just installed/updated XP on an Asus AT5ION. When I try to shutdown the system, the PC will go through a normal shutdown and then simply reboot into windows. I've tried disconnecting the power switch to the case from the mobo and jumping on the mobo with a screwdriver to ensure the power switch is not defective (still rebooted after shutdown with no switch connected to mobo). Also, I've turned wake on LAN off as well as all other wake on features in the BIOS. I've also tried disconnecting all USB, PS2, ethernet devices during a shutdown to ensure nothing is waking the system on (still rebooted). I've also checked that the windows reboot registery key is set to off on a crash/power off.
tried a clean reinstall of XP. update all drivers and bios. USB controller not recognized but I doubt this is the problem. Turn off restart problem still occurs. Also, if I'm Asus express gate, then this problem also occurs when I try to turn off (ie computer reboots when you turn off). The shut seems normal. There is ever a few second pause from full shut down to restart (which does not seem present when I hit restart).