The "Windows" key, located on the keyboard between the CTRL and ALT keys performs a number of functions. To use it, hold the key down and tap one of the following: - D or M shows the desktop - R Allows you to run programs from a toolbox - L Locks the computer when you leave it - T shows the menu in Windows 8 or Windows 10 - Q or C runs Cortana in Windows 10 - P shows the menu for additional monitors or projectors - 1 opens Microsoft Edge This is just a sample, there are more details to follow.