Real annoyance: every time I exited Outlook 2003, a Windows message appeared 20" later saying that Outlook crashed.
I just discovered that this was caused by the “avast5” complement, which was still active in Outlook 2003 after I upgraded to avast6.
Since I unticked this box in Outook / Options / Other / Advanced / Complements, the problem is solved.
Now how can I completely remove this complement from Outlook, so that the box cannot be ticked anymore?