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Why does Windows 10 sometimes seem to perpetually “shut down”? [duplicate]

Today, it happened again. It happens every once in a while. As I shut down my PC to take my bicycle ride, it displayed the normal “Windows is shutting down” screen, with no running applications left and no “installing updates” text or anything. Also no buttons to “abort” or anything. Just a text saying that Windows is shutting down, but it never did.

Eventually, I was forced to flick the power switch and thus it was probably not a “clean” shutdown. Although I see nothing wrong now that I’ve booted it up again…

Please don’t tell me to “check the event log”. That thing is utterly useless. It has never once in all my years of Windowsing told me anything of value whatsoever.

I don’t get what it could be doing. Again, since all the icons/text descriptions of running applications was gone, it can’t be something third-party “blocking” the shutdown. But what is Windows sometimes doing when it just won’t shut down?

Why isn’t it showing some kind of message indicating what it is doing? Can I press a secret button when this happens to “look under the hood”?