There are a few ways to take a screenshot of Windows. First, you can push the print screen button. This will duplicate the image on the screen. If you want to print it out, then you will have to copy the image from the print screen image and then paste it into something else like word. Another way to do this is to pushing two buttons at the same time. The first button is the alt button and the second button is the print screen button. Just like the first suggestion, you will have to copy and paste the image into another document.
The best suggestion is to use the snipping tool. It looks like a pair of scissors. When you click on the snipping tool, you can click new and highlight the area on the screen that you want a screen shot of.