I know I am stating the obvious here, but one of the things Linux has never done to me is refuse to shut down. Somewhere, about 5 years ago, they started tying the BIOS of the motherboard to Windows via ACPI or APM or something. The result was that even when you tried to turn the computer off, if Windows was hung, it never turned off. At least Intel motherboards have a feature where if you hold down the power for 5-10 seconds, it will turn off, but a few times I had to just yank the power cord out the back. And if you have a laptop? Good luck, buddy! Now you have to unplug it AND disconnect thas battery to reboot.