You want that as your background, or you want that to pop up when you log on? To get it to come up when you log on, search around on Google for the guide. For a screenshot, just ask somebody to take one for you.
If Print Screen doesn't work, then I couldn't tell you. All I can think of is just push print screen and when Windows is done booting, try and paste it into an image editing app. If it doesn't work, then it's not gonna'.