We had a few calls on this, so we figure we would post a quick article. With windows 10, you get a nice and clean start menu. Sometimes due to a miss-click you end up with a full screen start menu. To fix this is easy.
On the start button click on “Start” then click where it says “Start Settings”
Now sometimes it will take you to this screen, click on Personalization (But it may go to the next screen)
Now where it says Use Start Full Screen, set it to off, and viola! You are done.