Apps Arrow Square (I don't know what else to call it. *Please see description below.) After downloading Windows 8.1 on my Surface Pro Tablet, I now always see a square window* on the left margin of the screen after I click on any App, including the camera. The square obscures part of the what the camera sees. The square also remains after I leave the App and it obscures part of the Keyboard when it's up and parts of all other pages (including Web Pages). The only way that I can get rid of the square is to restart the tablet. This is very annoying and clearly not a satisfactory solution. Is there an easier way for getting rid of the square? (Touching the square doesn't do it.) *The square contains a large arrow and this text: "Switch between apps. Swipe in from the edge to go back to the last app you were using. Tip: Begin with your finger outside of your screen."