It's about as much to go on as we ever have. This is a frequent problem that
seems to have several possible causes and no consistent solution. Some of
the possible solutions that have been reported:
1. Finding and correcting a corrupt address in the list (e.g., if the
scrolling seems to hang at the same point every time).
2. Removing and re-adding the Outlook Address Book Service
3. Updating video drivers
4. None of the above