How to Move Off-Screen Window back On-Screen

 Today i switch on the Windows 7 PC which was setup for 2 monitor display before but now only use a single monitor.

When i start a program where it has displayed in the second monitor before now has became off-screen Window. I can't use the mouse to drag it back to the main monitor. 

From the Microsoft Bing search i have found some sites that do the trick, howto geek and tenforums. 

I use the simple trick as follow.

1 Press and hold the Shift key, right click or press and hold on the taskbar icon of the opened off-screen window (ex: "Store" app), and release the Shift key.

2 Click/tap on Move. (see screenshot below)

If Move is grayed out, then it means that this window is either minimized or maximized. Click/tap on Restore, and repeat steps 1 and 2.

3 Your pointer will now turn into the Move  pointer. Perform either action below to move the off-screen window back on-screen where you want.

Press any arrow key, use your mouse or touchpad to move the off-screen window to where you want, and click/tap on the left button (primary) on the mouse or touchpad to drop the window.

That's it.