I just discovered this in Windows 7:
We know about Alt+Tab:Switch to next/previous focused window. If you add Ctrl and make it Ctrl+Alt+Tab, guess what?
Its pretty nifty feature i love it. It locks the selection window pretty well.
BTW, did you know in the when in Alt+Tab, you can use mouse to quickly select the window you want?
You can do the same in Win+Tab mode as well. Again if you use Ctrl+Win+Tab, it locks the window, so you can use mouse or keyboard to navigate to the windows there!
Thank you Microsoft!