There's a key near the upper right, should say something like "PRT SCR" or maybe even "print screen". Hit that key, then open up a new document in whatever image editing program you have, and paste the image into the program, then save it as a jpeg onto your desktop or into a folder or wherever you want to save it to.
You could also hit the "PRT SCR" key, then open up MS Word. The image will be there in the Word doc. Intuitive? No way, it's Windows! If you want intuitive and user friendly, you should be on a Mac...