I'm getting a problem that is recurring more and more often where I engage full screen mode with a window (often word) and then use the control button to flick between more than one. Sometimes when I release it from full screen mode the window is stuck under the top bar of the screen and I can't move it because I can't access the top bar or the minimise, maximise or red buttons. Can anyone shed any light on this? How do I avoid it happening while stll being able to maximise stuff? 

