Windows 8? If so, that's a known bug in the GPU code for Windows 8.
We are working with Microsoft and the GPU vendors to get it fixed.
In the meantime, setting the GPU mode in Photoshop preferences to "basic" makes it go away for most users.
It is Windows 8. I'm a complete newbie. Would you, or someone, be able to guide me through what you are talking about? I don't know what GPU is and I don't see either in GPU or "basic" in the preferences. I'm also using the Student and Teacher Edition.
The GPU is the big chip on your video card.
In Photoshop's preferences, go to the Performance tab, at the bottom right corner is the GPU section and you need to click on the button that says "Advanced Settings", then change the Drawing Mode popup to "Basic". Accept the dialogs to close them, then quit and relaunch Photoshop.
Thank you. That worked. Do you know if I will have any other potential problems as a result of that change?
It just limits the performance of some GPU features.