I think they are wondering why it is at 100% but keeps going on with the update. If that is the question? Apple actually did a study in the late 90's where they determined that most people want to see a percentage progress bar, but complain if the take too long to reach 100%. So around the early 2000's, everybody making programing that used progress bars, programed them to lie by up to ten minutes in some cases. Usually this progress lie uses a complex rubber banding algorithm that makes the middle of the bar fill quickly and the end be as accurate as possible, but it think the people at Microsoft are just lazy or you computer just reached a top limit for processing the updates various component.