Lightroom: LR4 won't open - Unexpected error opening catalog

Question

I cannot open LR4. I get an, "Unexpected error opening catalog. The catalog could not be opened due to an unexpected error." This occurred after a WIN7 update failed.  It restored the system to an earlier version.  In doing so, it also reverted LR4.2 to LR4.1.  I have seen other threads to open a different catalog and/or create a new.  The problem is that once I go to "Choose a different catalog", I get the Windows screen where I can select my backup.  I select the backup catalog and click "Open".  The window goes away, but the underlying LR "Select a Catalog" window still only shows 1 catalog to open.....my original catalog.  The backup doesn't show up in the list.  (The backup is not a network drive and it is not read-protected.)
I then try the "Create a new catalog", get the Windows screen, enter a new name and click "Save".  The same thing happens.  The Windows screen goes away and the LR "Select a Catalog" window still shows the orignal catalog in the list.  Thus, I cannot create nor choose a different catalog.  Am I doing something incorrectly?
Thanks.

Answer 1

Try right-clicking on the LR icon and selecting "run as administrator". This fixed the problem for me. I think the problem recurs every time Windows gets and update. You can also set LR to always run with admin privaleges on the properties window.