c47439d4_of_Windows_8_Keyboard_Shortcut__Description
[Keyboard Shortcut] Win+Print Screen [Description] 
Takes a screenshot and saves it to your Pictures folder. Pressing "Print Screen" on its own will just save the image to your clipboard, and you'll have to paste it into a photo editor. This is much more convenient.
Useful List of Windows 8 Keyboard Shortcut
Description