Originally Posted by clh
I was looking up for this solution too and found it at Microsoft Support site (How to configure automatic updates by using Group Policy or registry settings
Locate and then click the following key in the registry:
(You may have to create the keys WindowsUpdate
Create the following DWORD entry:
Done! It was hard to find, but it's surelly simple.
The Automatic Update configuration will be locked at Windows Update and you gotta delete the entries in order to unlock.