All
Windows XP
Windows 2000
Windows 2003
Windows Vista
Disable access to the Windows update feature
This setting enables you to disable the Windows update feature so that no body else can access it.
Disable automatically restart if update has been installed
This setting lets you disable the auto restart option if Windows update has been installed in the system.
Set Windows Automatic Updates.
This tweak lets you configure Automatic Updates to Windows system even when the Automatic Updates is disabled.