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Go to your catalog folder. Usually found in Pictures by default. Delete the file ending .lock
Do not touch the catalog file ending .lrcat
Good information, I was able to open Lightroom with the .lrcat extension, but It appears that my most recent changes are in the .lock catalog. Is there a way to unlock the .lock extension?
I don’t think so Bob. The lock file always appears when LR is running and should disappear when you quit. Your work was probably lost in the crash if LR was still writing information to the catalog. AFAIK the lock file itself doesn’t contain any work, it simply prevents the catalog being opened twice.
AFAIK the temporary information that hasn`t yet been written to the catalog while Lightroom is running, will be stored temporarily in the lrcat-journal file which is stored at the same location as the lock file and will also disappear when Lightroom shuts down. If Lightroom crashes, the file should stay there and Lightroom will recover data from the file when it restarts. I`m afraid this file might get lost when the whole system crashes and not just Lightroom.
I'm afraid the whole system did crash; I got the "blue screen."
Thanks to you both for all your help.