I have a PC here that prefers rebooting to shutting down. Every time I try to shut the PC down it reboots, however it is possible to turn the PC off by pressing the power button.
The problem is not Windows-specific, the Ubuntu Live CD does exactly the same that's why I said that it is no software problem. I checked wake on LAN, it is disabled and I also reset the BIOS settings to factory default. That might not mean that it can't be a BIOS problem but I don't know what else to try here. I did not check any hardware yet but nothing exploded so far.
I don't know what could have caused this behavior as it is not my PC.
The Mainboard is a
ASUS P5Q-E P45.