Well damn, I didn’t know this:
To Save Your Screenshot as a File
Press the “Windows logo key + PrtScn.” If you’re using a tablet, press the “Windows logo button + volume down button.” On some laptops and other devices, you may need to press the “Windows logo key + Ctrl + PrtScn” or “Windows logo key + Fn + PrtScn” keys instead. Check your laptop’s manual for more information.
The screen will dim for a moment, and you will see the screenshot appear as a file in a folder entitled “Screenshots”, inside your default “Pictures” folder. The screenshot is automatically labeled with a number.
I tried it on this notebook (Windows 8.x!) and it worked.