Windows key + digit (1-9) restores (or brings to front) the window corresponding to the respective application in the taskbar. If there are multiple windows bel

Windows key + digit (1-9) restores (or brings to front) the window corresponding to the respective application in the taskbar. If there are multiple windows belonging to the application, the combination will let you cycle through them all. Very useful in combination with pinning of programs to the taskbar. Also, Windows key + l locks the screen (this one is old though).