Thanks for the reply. I'm actually troubleshooting for my parents (don't we all). And before I put them (and me) through those steps, I have an inclination that's not the case. Below is a screenshot of the desktop after the login is complete. Same picture appears correctly. Given that the gray bars appear left and right on both the login and desktop screens, it would seem that scaling is not the problem. And you'll notice that on the login screen, the image is pushed off the bottom, we now see more foreground and road on the desktop.
Tim