I am using a free personal license for TeamViewer 12 to connect between two Windows 10 computers. I just started and note the task bar frequently disappears. I can not get to the "Start" button or any of my launch icons on the Start menu, which is the way I launch all my frequently used programs. Sometimes I can get it back by switch back and forth between full screen view. But many times I have to log out of the session and restart a new session. The Task bar does not stay very long before it disappears, so it is quite aggravating. Does anyone know of a fix for this problem?