Could you please try opening Lightroom as an Administrator? Right click on the Lightroom.exe file and select "Run as administrator".
If that doesn't help then, rename the Slstore and Slcache folder as mentioned in Lightroom doesn't launch or closes automatically after splash screen
Let us know if that helps.
No still does not work.
running as administrator still creates the lr.lock file but after remaining the files suggested to old the lock file does not appear. i tried as administrator after renaming the files but there was no sign of any activity.
Could you please ensure that after reinstalling Lightroom 6 it is updated to the latest version 6.10?
How can I update Lightroom if it will not start.
Thanks, downloaded the update but it would not work. Used Windows update and loaded very file available and got Lightroom working!
note that I also copied the previous catalog backup into the catalog folder after removing the latest. It appears the last backup was faulty as I tried putting it back in and Lightroom crashed again.
Only lost a couple of days work thanks to backing up every day.
Thanks to everyone who helped with suggestions.