"Ghost" map window appearing
 

This one just popped up on me, it was fine the other day. I get a grey box where the map window would pop up if I activated it. It's in the cockpit too. Did a big Windows Update yesterday, could there have been something in that?

Press alt and right click window with mouse you should be able to close it then.

Sometimes you cannot select the window. Open a new one and close 'm both is the solution then.

I was having the same problem, this solution worked for me after a few tries. thanks!