I have a backup “Microsoft All-in-One Media Keyboard” I need to use when my primary Ergonomic Wireless Desktop keyboard decides to die (possibly “concussion” induced at 11pm when technology decides to become my Nemesis).
The only problem is it does not come with a Print Screen button.
But thanks to some wonderful soul on the Interwebs we have an answer:
Print full screen: Fn + Windows Key + Space
Print current window: Fn + Alt + Space
Source: Microsoft Answers