Maybe there is another Windows versions difference I am not aware of.

In my configuration this is still working. I went to services.msc and searched for "Windows Update". I stopped the service, went to its preferences and selected "Disabled" as startup type.

Pro 10 user here. Windows started wanting to update last week, but isn't because my group policy is set to notify for download and auto install, so all i had for the duration of the conference i was at was a notification.

It works fine.