JDGHOST:
Tried that Sam and when in fullscreen it just takes a screenshot of my computer home screen ?
Win+Shift+S did nothing at all
What OS are you using? I'm using Windows 10 Home.
Just PrtScn by itself also takes a screenshot of the fullscreen game, which can then be pasted (Ctrl+V) into another app like Paint.
PrtScn (to take a screenshot of your entire screen) and Alt + PrtScn (to take a screenshot of the window that is currently in focus) have been around in Windows for years.