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#11
Press Alt+F4 this gives you the shutdown menu. If you have pending Windows Updates, it will ask if you want to Restart installing Updates, or Shutdown installing updates.
Yeah this has happened to me too, just in the last few days. Same windows version too. I'm guessing an update added this "feature". Hopefully will be fixed soon.
I see an old article on Winaero on how to revise the default Shut Down option:
Set Default Action for Shutdown Dialog in Windows 10
But I'm thinking to just hang in there a few days, hopefully someone at Microsoft will wake up.