Recover Windows 10 Opening Off Screen?
Just had this issue... here is how I solved it...
Click on the taskbar icon for the problem window.... to make it active.
Use ALT+Space or ALT+SHIFT+Space (depends). This should open the Move, Maximise etc. options.
Click the Maximise. You should now see the window.
Now drag it so its definitely on your current screen.... all fixed.
Good Luck
All of they above 'solutions' don't work for me on Windows 10.
I tried pressing repeatly WIN + D + <- that worked for me.