(1)First part of problem is file size - PST is about 1.8GB, I know 2 GB is the limit but don't think it reached there. I saw there were HUGE amounts of data in deleted items so did a mixture of deleting them and archiving (not done before). This resulted in an archive file of about 1.7GB and main PST still about same size - i.e. archiving did not reduce pst size. The mailbox cleanup routine had said 1.5GB in deleted, but now did not, yet not reflected in file size. My fear is file is corrupted in some way, and needs a real spring clean. I've tried the inbox cleanup utility....scanpst already.
(2) linked problem - recently lost outlook and had to revert to backup due to error - 'outlook has encountered a problem and needs to close' (making outlook totally unusable since error won't go away). This was following a major bout of deleting items to clean it up. Possible link to this, since it happened again after another deletion session. SO, before deleting more, I want to clean up the guts of outlook.
(3) Possible 3rd linked problem - in the navigation pane, there are 3 versions of personal folders showing - each can be opened. all seem to be duplicate views.... can we cut back to one?
(4) if it is not possible to clean up outlook very well, is it possible to export all data and start afresh with a new core ouitlook? (last resort)