Download and install the FREE photographic software IrfanView.
While you are at it also install the add-ons too.
It is a pretty good photo software actually. Nice to have even if you
have Adobe Photoshop Elements or Corel PaintShop Pro Photo xx. It might
be a bit basic for advanced users but it opens up pretty fast and does
most things one would want to do with photographic software.
Hit PrintScreen
Open IrfanView
Paste into clipboard
& you are done!
I know this is a late reply, but didn't one of the "F" keys do a print
screen? Seems to me one of them like F12 would write a screen shot to the
installation folder. Might have been one of the other older games. . .