Recover Windows Opening Off Screen?

Windows 7 has a cool new feature that should help. Click the icon in the taskbar to ensure that the program has focus. Then hold down the Windows key and press the right or left arrow a few times:

+→ or +←

That should move the window across your screens and eventually bring it back onto the screen that is still active.

Is there a single Windows command/action that can instruct all off-screen Windows to reposition to the closet desktop real estate that is actually visible?

Yes, resize the desktop to a different resolution.

All already open windows will snap to places in the new screen real estate. You can then change the resolution back.

The disadvantage is that this works for open windows. (It also feels as a kludge, there should be a better way. Maybe someone will post that. Meanwhile you can use my method so you can continue working).

You could also just press WIN + P and select to use a second device and expand the desktop there. Afterwards switch back to single screen. Worked like a charm for me.