It isn't difficult to turn off Automatic Updates in Win 10, but it's not well publicised and is well hidden!

Go to Control Panel > System and Security > Administrative Tools > Services (or simply search for 'services' in the Control Panel main window).

Scroll to the bottom of the list in the Services window, and you'll find an entry for 'Windows Update' Right click on this, choose 'Properties' and for 'Startup type' Select 'Disabled'

I do this primarily because I have a limited data allowance and get financially caned by my ISP if I exceed it. Obviously though, for security reasons, it isn't a good idea to never run updates. So I tend to do it at the end of the month if I've got a lot of data left or when I have access to free WiFi.