In case you didn't catch my post elsewhere. Here is the definitive way of killing the little sod!

 

I'm referring to the situation where you are in fullscreen and have a window open i.e. GPS, on a second monitor. Should you go to windowed mode or move the GPS about (resizing etc.) the window will disappear and the hourglass shenanigans start.

 

Cure:

Open another window, such as radio stack, options or any of the shift+#s, move that across to your second monitor and as if by magic the GPS will reappear! Drag it back to the second monitor and turn off the surplus window. Tada!

 

I think the problem is that windows loses focus of the extra window and is desperately trying to relocate it.

 

Hope that helps.

 

Nice find Ron.  I fly windowed mode myself, but I know you prefer your FSX fullscream.