I upgraded my Dell Insprion 11 laptop to Windows 10 today. Shortly after the upgrade, I rebooted. Now, my desktop will not display; only the tiles. I can see my background picture, but I cannot make the tiles move. Also, the screen on my laptop is supposed to reposition but it "sticks" in one positon. I checked the flag which will lock the screen position and it is "off". Any suggestions will greatly appreciated. Thanks...