====== Windows Server 2003 shutdown Group Policy ======

Because I always forget about this one...

http://pve.proxmox.com/wiki/Acpi_kvm

For Server 2003 (and 2008) run

  gpedit.msc

and change the key

  Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Shutdown: Allow system to be shut down without having to log on