Please refer to this question
. The problem I described several months ago was solved by running the repair option of scanpst. However, in the last two weeks the same problem has begun happening again and is now happening multiple times per day.
Symptoms are exactly the same -- the dialog boxes I pasted into that question are the ones I'm seeing again. However, this time scanpst doesn't solve the problem. Rebooting the system restores Outlook to operation -- but only until it locks up again.
I appreciate any suggestions. BTW, the pst file is 5.2GB.