Doing the official update process through windows update. Where you click more info and it brings you to a page to download the update program. The program downloads and verifies the update and gets ready to install. It reboots and brings up a blue update screen. At about 30% it reboots. Then goes to about 75% and reboots again. Now its just been sitting at a black loading screen with spining circle. Its been at this screen for over an hour. I'm worried something is wrong. Is this normal. Should I just wait or power off and try to troubleshoot. I should note I am doing this on a Acer Laptop.