Access or minimize your quick-start apps without using the mouse

• Use the combo [window key] + [1] to [9] to activate or minimize the corresponding programs from your taskbar.

• Use the numeric keys on the top of the keyboard.

As you can see in this small demo, while the mouse is in the middle of the screen, pressing win+2 windows explorer
starts which is the 2nd icon. 

By pressing win+2 again it gets minimized.