From: atxmaxpro on

I had the same problem. One day outlook worked, then it quit.

When I started to install sp3 for xp, I had two bad files. Not sure if
they were the problem or not.

They were inetcomm.dll in the windows\system32 folder and
wmiprovdll.dll in the windows\system32\wbem folder.

I renamed both files by adding an extension such .old

I also installed sp3 before I tried outlook again. It now works again.
I could not install sp3 without renaming the listed files. Windows
automatically created another in its place.

This is something you can try anyway.

Keith