Complete list of the windows logo keyboard combinations

Windows key: opens the start menu
Windows key plus pause Opens system properties
Windows key + U Opens the “Ease of Access Center”. This contains a number of features like a magnifier and an on-screen keyboard. I'll say more about the Ease of Access Center in the next tip.
Windows key + T Moves the focus to the taskbar. Once you’re there, you can use the arrow keys to select a particular icon or group and then hit “Enter” to launch or activate it
Windows key + B Puts the focus on the item in the Notification Area named “Show Hidden Icons”. (The Notification Area is also called the System Tray.) Then press "Enter" to display and customize the icons. This allows you to choose which icons are displayed in the Notification Area.
Windows key plus m, Minimizes to the desktop
Windows plus d Minimizes to the desktop
Windows plus f Find folder or file
Windows key plus r Opens run menu
Windows plus ctrl plus f Search for computers if you are on a network
Windows key plus l Lock computer or switch users
Windows plus number Starts the program pinned to the start menu in that position. If the program is already running, it will switch to that program.
Windows plus shift plus number, Starts a new instance of that program.
Windows plus plus control plus number Switches to the last active window.
Alt+Windows logo key+number Open the Jump List for the program pinned to the taskbar in the position indicated
Windows plus tab Cycles through opened programs
Ctrl+Windows logo key +B Switch to the program that displayed a message in the notification area.
Windows logo key +Up Arrow Maximize the window.
Windows plus left arrow Maximizes the window to the screen's left side.
Windows logo key +Right Arrow Maximizes the windows on the screen's right side
Windows plus down arrow Minimizes the window
Windows plus home Minimizes all windows but the active one.
Windows logo key +Shift+Up Arrow Stretch the window to the top and bottom of the screen.
Windows logo key +Shift+Left Arrow or Right Arrow Move a window from one monitor to another.
Windows logo key +P Choose a presentation display mode.
Windows logo key +G Cycle through gadgets.
Windows logo key +X Open Windows Mobility Center.