Sometimes a window gets moved so that the tile bar is off screen. This means you can’t use your mouse to move or maximize the window. If it is far enough off screen, such as on a monitor location that is no longer there, you can’t even get to the monitor. This kind of thing happens a fair bit with multiple monitor setups, especially if you are moving around with a laptop.
There are several solutions to this problem:
1) If you have multiple monitors, adjust the location of monitor so that it exposes the title bar. This is a bit annoying but it does work.
2) XP & Vista users can right click on the task bar button for the window. There you will find the usual options for maximize, size and move. Just chose move and the arrow keys should start to work. Once you start moving the window with the arrow keys the mouse can be used to move the window too. To drop the window just press enter. This was my favorite little tip but it stopped working in Windows 7 quite the same way. In Windows 7 you need to get the window list to appear when you hover over the button a snapshot of the windows appear. Roll over to the window in trouble and now you can right click to get the widows shortcut menu.
3) All versions including Windows 7 can click on the window’s button on the task bar. Once the window is the active window the shortcut control can be accessed by pressing Alt-Space. If you can’t see the menu then hit the down arrow twice as Move is usually the second command down.