Please follow the below steps:
1. Uncheck the "Use Graphic Processor" option under Lightroom preferences while you are in Library module.
2. Restart Lightroom and check whether its still saying not responding or not.
Hi Sarika and hi Robert,
I have the same problem as Robert, although Lightroom also gives me a "Lightroom not responding message" in the develop module when moving from one image to another. I have tried to uncheck the "use graphic processor" option under preferences as you suggest, but I then get a message saying "preferences not responding". Any ideas?
I have restarted my computer and this time I have been able to uncheck the "use graphic processor" box. I have tested Lightroom for about 30 mins and the problem seems to have been resolved.
Many thanks for the tip Sarika. Hope it works for you Robert.