Thought I had this fixed, but have not. When I mouse over an icon on the taskbar and click on it, sometimes it will open a window to an open file or offer its menu that I can select from. But when the mouse moves off the task bar there is no focus; what was offered just disappears. Task View is no better. When I click Task View I get the desktop with small views of open programs, but again when the mouse moves to the desktop everything disappears. If I do it a few times it may stay up until I can click into one of the small windows. Even then sometimes I get focus, sometimes not. I have tried Tablet mode on and off. This is making me terribly inefficient as I try to work with various programs concurrently, especially if I have a client on the phone.
I am using Windows-64 10 Anniversary edition. I really can't recall if I had this problem before installation of the Anniversary edition.