If you've ever had a window accidentally get misplaced off-screen — this is especially common if you use two monitors — here's how to corral it back into place:
1. Find the application on your Windows taskbar, and right-click on it.
2. Click "Move" in the application's menu.
3. You'll see that your cursor changes to a “Move” four-headed cursor.
4. Press any one of the arrow keys (left, right, down, or up) to move your mouse, and the window should return to the screen where you want it.
According to the The How-To Geek this trick should work on any version of Windows.