I had a major power out last night while using Lr5, we have power back now but when launching Lr5 i get this error and I have rebooted 2 times nows with no results. I have a normal pc, and this is the error message i am getting.......Lightroom encountered an error when reading from its preview cache and quit, so i say ok and still nothing works. i am trying to process my event photos from yesterday and i need to get this fixed urgently!!! please help
Delete the Preview Cache folder.
It is in the same main folder as the LR catalog. Usually in your Username folder.
Once delete LR will rebuild it once LR is opened.