Update your graphics driver/ disable OpenGL in the PS prefs - whichever is approipriate.
Please excuse my ignorance but being a novice computer user how do I update my graphics card and where do i find "OpenGL" in Photoshop. I looked in preferences but don't see it.
Thanks for your help - Peter
Edit --> Preferences --> Performance --> Graphics Processor Settings
And download the latest driver for your graphics card from NVidia, AMD or intel and install it...