I'm not sure if this will work, it does sometimes, maximize the window, then close it using the File Exit in the top left hand corner and not the little X in the right corner, then try again that may cure it.
This thread is now locked and can not be replied to.
How to get Windows 10 for free | How to install Windows 10: There is still a way to avoid paying…
1995-2015: How technology has changed the world in 20 years
Alex Chinneck’s giant ice cube Christmas tree at Kings Cross