"This could take a while" - NOT amateur radio

And they are not kidding!!! Usually the "perfect" Windows 10 updates take a few seconds to install. The latest took a full hour and a half! They must have redone Windows 10 in its entirety. If Windows 10 is supposed to be that good, why was such an update needed? Impressed? Not at all. Now I wonder if I switch off this PC will it ever switch on again?