Please go the Edit option from the Library Module, then go to the Preferences.
Please go to the Performance Tab and uncheck the option for " Use Graphics Processor"
Restart lightroom,and see if LR works.
Please let us know if it helps.
Thanks for the suggestion, but when I try to click to uncheck that option, Lightroom hangs. Is there a way to edit the preferences file by some other means?
In Windows: C:\Users\myName\AppData\Roaming\Adobe\Lightroom\Preferences\
Using your favorite text editor (not word processor).
In the file, search for "useAutoBahn"; it is probably near the bottom.
Set the value to "false" (without the quotes).
Please go to the Device Manager of Windows, from there expand Display Adapters.
Disable the graphic card and then open Lightroom , go to the preferences of Lightroom , then the Performance tab and uncheck the option for " Use Graphics Processor " .
Close Lightroom and go back to the Device Manager and enable the Display Adapter.
Open Lightroom and then work in Lightroom and check if it works fine.