How to turn off windows update 100%?

Question

Windows

Good afternoon, I use a 3G modem, so I save every megabyte of traffic.
And so, so that different programs would not climb into the Internet, it opened only 80 and 443 ports in the firewall.
But there was a surprise. Windows-infection- pumped up updates. It's good that at least I saw it in time. In Windows 10 Preview, I did not find the item "install updates automatically" - so I searched the Internet and put the key in the registry
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update]
"AUOptions"=dword:00000001
Is there now a guarantee that he is a bad creature, will not get updated?
What can I do for this?
Where does he send requests? can cut down this address in a firewall? Or is it on top of the firewall?
Please tell me what to do to be 100% sure that nothing is downloading?

Answer 1

What is there and how it turns off in the top ten is unknown, because the test version, nothing can be said for sure.
Try in hosts -
127.0.0.1 update.microsoft.com
127.0.0.1 windowsupdate.com

Answer 2

In the preview version, it seems like you can't turn off updates - that's why it's a preview version. MS gives it to use for free, not to make the user feel comfortable, but to test their solution, including the update process.

Answer 3

turn off the update service and write in the host as advised.