For users which really want to prevent Windows 10 from automatically installing updates, here are some methods to disable automatic updates. Depending on which method you use, you will still be able to manually check and install updates, or not be able to install updates at all...
Note that the methods leverage group policies, which is not supported on Windows 10 "Home/Essential" editions. A minimum of Windows 10 Pro or better is needed.
The following is in fact a registry "hack" to simulate the presence of a GPO telling the system to disable automatic updates. You can still manually check for updates and install them.
This alternate method is done through a GPO and effectively disables internet access for automatic updates. You can create a domain policy or use gpedit.msc to edit the local computer policy.
Note that this will disable manual updates too!