How to delete Disable Windows Update Auto-Restart

Prevent your system from automatically restarting after automatically installing Windows Updates.

  Sets the registry key HKLM:Software\Policies\Microsoft\Windows\WindowsUpdate\AU\NoAutoRebootWithLoggedOnUsers to 1

  Alternatively, group policy can be used to set this as well:
  http://kevinjameshall.wordpress.com/2012/12/26/windows-8-updates-disable-auto-restart/