Since when? You can turn off Windows update service but it will turn itself back on. Even with Windows update turned off, they still have a way of quietly slipping stuff into your PC.
Use the Group Policy.
>Even with Windows update turned off, they still have a way of quietly slipping stuff into your PC.
No.
https://support.microsoft.com/en-us/help/4026834/windows-10-...
The settings I suggest don't disable it entirely - though I think that's an option, if not one I'd use myself - but it does let you choose when things get installed, after downloading them in the background.
I've been quite happy with this; I generally do want updates when they come out, but also want the option to potentially reliably defer them (or, more precisely, the potential reboot...) for a day or two.
(As for Windows versions, I use Windows 10 Professional.)
Most important: Windows doesn't allow me to set my USB modem connection as metered.