Are you serious? You need to do a PC 101 course pronto! What if your trading system dies? I'm assuming you can't reimage it or have an alternate backup?
Start button, or Windoze button (you know where that is?)/run/mspaint into runbox (or runline depnding what Windoze you have)/ctrl-v your prtscr shot into mspaint then crop tool on left allows you to crop then copy/paste any bit you like to a new image.