Who do you have to capture?

If you need ,everyone can capture. if you capture screen ,you could do this fllow.
Hit the Print Screen key on your keyboard, then open the MS Paint, press CTRL+V, save it and it's ur screenshot.
But if u wanna capture anything on the screen, i think the print screen button could help u.
So i recommend u try PCHand Screen Caputre. It could help u capture anything and offer a build-in editor. Im using it, it is easy to use, even for a novice. I think it is pretty good.