How do I stop the update notification from minimising my game window?

Hi, this has been driving me absolutely nuts. My computer wants to restart itself for a feature update, and sometimes I don't particularly want to do it right that moment because I'll have a lot of documents open etc.

If I'm playing a fullscreen game, however, the notification will alt-tab me out of the game, which is incredibly irritating. I can't find a setting to stop it from doing this, and I had a search on this subreddit with no luck. Is this something that can be disabled yet??