If you ever used a secondary monitor and disconnected it without remembering to bring the windows you put in the secondary monitor back to the primary monitor, you might still see that the application is still running but you don’t see it in the screen. This is because it’s still running in the secondary monitor. There is actually a simple trick to solve this problem easily.
Step 1: Press Alt+Tab until you get to the “lost” Windows OR you can click it on the taskbar to make it active
Step 2: Right-click the application on the taskbar, and click Move
Step 3: Finally hit any arrow keys on the keyboard (left, right, up, down) and move your mouse. *Poof* the Window magically pop back into the screen.
Another alternative method is to Right-click on the taskbar and choose Cascade your open windows.
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