Does anyone else had this problem, fixed it and it hasn't come back?
I had this problem, Office was installed first, then Norton's Internet Security 2005 (crud) and after removing MSN annoying Messenger program I started having this problem, reinstalled Norton's crud and it was fixed until a short blackout played up with Outlook because it was open at the time, now it is back again in all its glory.
(Personally I wouldn't use Norton's Internet Security but it isn't my computer)