Problem: Outlook starts normally with a POP3 account in a POP3 Outlook
profile. However, I have a work Exchange account which I configured using
instructions yesterday. Worked fine. Yet today, Outlook crashes - fails on
opening Microsoft Exchange Account. Hangs and then forced exit produces
Microsoft error report. On restarting, Outlook says that "outlookaddin.dll"
caused a serious error and has been disabled. Disabling it means that Outlook
no longer pulls down emails from Exchange. Re-enabling it causes the crash
again, Catch-22.

Versions:
Dell XPS M1210 - brand new.
Microsoft XP Professional SP2 (fully patched)
Microsoft Office Outlook 2003 SP2 (fully patched)
McAfee SecurityCenter pre-loaded by Dell.

I configured the Exchange profile yesterday and it worked fine. Changes --
possible cuplrits? -- in the meantime:

1. A large McAfee patch was installed semi-automatically.
2. Attempted to install Treo 650 Palm Hotsync. This did not complete
successfully. Hung while hotsyncing to Outlook. Then uninstalled
successfully.

What I've tried, but which does not fix the problem:

a. Detect and Repair run within Outlook completes successfully.
b. Disabled and uninstalled McAfee Spamkiller.
c. Remove the Exchange profile through Control Panel Mail, and create a
new one with a different name.

Suggestions very gratefully received!