https://www.quora.com/How-do-you-shut-down-a-Windows-10-computer-without-updating-it https://www.quora.com/How-do-you-shut-down-a-Windows-10-comp... So when Wi

https://www.quora.com/How-do-you-shut-down-a-Windows-10-computer-without-updating-it https://www.quora.com/How-do-you-shut-down-a-Windows-10-comp... So when Windows says you have an update available, the design is that it did all the work that is possible and all that's left is (in theory) the copy bit that's left. My completely ill-informed guess is that there are exceptions to this rule by teams that aren't fully aware of how updates work under the hood and as a result upgrading takes longer than it really should. As time goes by those teams get hit with a stick and they fix things, but the upgrade team probably plays a fair bit of wack-a-mole.