You can set active hours, in which Windows 10 won't automatically update, in your settings. Or, when there is an update, you can choose a moment when to install it, instead of Windows 10 choosing its own moment.
http://www.windowscentral.com/how-configure-active-hours-avoid-windows-10-sudden-restarts-during-updates
You're still forced to update, but at east it won't update while you're in the middle of something.