I tried updating my computer from Windows 7 to Windows 10. It seemed to work well for a day or two, then explorer (the desktop) began flashing on and off.
In addition, when the computer began flaking out, it informed me that my license was not valid, and I had to activate windows again. I tried without success.
I then decided to revert to Windows 7. The computer is stable now, but I can't get my main LR catalog with all my client photos to open. "Unexpected Error". Trying again gives the same result.
When I try to open the most recent backup, it says the file is not writable and cannot be opened, OR I might not have sufficient permissions.
Any help will be greatly appreciated. I've been using Lightroom since it first came out and has been almost totally trouble free until this episode.
The catalog that you are trying to open , please check if it has the read and write permissions.
Also after checking it, I would suggest to uninstall and reinstall Lightroom on your computer once.
Please let us know if it helps.
Thanks for your reply.
I removed Lightroom (and all creative Cloud Apps) from my hard drive, restarted the computer and reloaded them all.
The problem remained the same.
I copied the catalog (and backups) to my "Active Clients" folder, and saved everything to my "Passport" 2 Tb drive and connected it to my laptop running Windows 10. Opening the catalog worked fine, and it is continuing to work flawlessly.
My conclusion is that Windows 10 may affect the catalogs so that reverting to earlier versions of windows may render catalogs unworkable.
Although working on my laptop instead of the desktop is inconvenient, at least all the (incredible quantities of) work I've done isn't lost...