How Do you take a Screen Shot? there are a few ways to do just that.
#1. Press the PrtSc key (short for print screen) on your keyboard. This key takes a capture of everything currently on your screen and puts it in your clipboard so you can paste the capture into what ever program you need it to be in. You can paste by Right clicking and clicking paste or using the shortcut key Ctrl+V
#2. If you only need to take a picture of part of the screen there is a Windows app called Snipping Tool. Just type in snipping tool into your Windows Search Bar and open it. Snipping tool allows you to place a box over the portion of the screen you want to capture.
If You just want to save the screenshot as a picture you can open up Microsoft paint and paste your new image there.