My printscreen doesnt work...
I'm assuming your running windows (since you said print screen)? If so, there is a built in program on all windows devices that lets you do screenshots without the printscreen key.
It's called snipping tool, just use that. You can search it from your start menu.
It's extremely straight forwarded and you can save your screenshot instantly.
In case you have a Mac, they have a very similar tool called "Grab" (located in /Applications/Utilities) that does exactly the same thing.
Anyway, hope that helps.