How can you get a screen capture on a PC?

Try pressing the 'PrintScreen' key above the numeric keypad area on your keyboard. This may be linked to some bitmap software in your system.

If this does not work then you will need to install some software. I find the Snagit tool very good and you can use it for free for 30 days (I will place the link below). There are also some free ware utilities that you can download and install (I will make a link to some of these too).