LR6 and Win10 problem. When I run as administrator LR things are ok and previews appear immediately. When I don't, LR appears to be redoing all catalog previews while in the LIBRARY module. It says 'calculating'. I gave myself full control to LR files as suggested. This allowed me to get LR running but not give me previews.
When I go to DEVELOP I get the image so it's not an LCAT problem. Very frustrating