I run Lightroom 5 (64 bit version) on Windows 10. On launching I get the following LR error message over the Splash screen:
Lightroom encountered an error when reading from its preview cache and needs to quit.
On pressing OK a further LR message appears saying Adobe Photoshop Lightroom 64-bit has stopped working , The only option offered is 'Close Program'
I have uninstalled and re-installed but there is no change.
Delete your preview cache. Find the folder that contains your catalog file, the preview cache is a subfolder whose name ends with Previews.LRDATA. Delete this subfolder. Do not delete anything else.
Many thanks for your advice. It's worked fine and I appreciate your reply.