MSI installer runs when I run Office 2003 app

I just installed office 2003 as an upgrade from office XP on my Windows XP
SP1 laptop. When logged in as an administrator everything runs fine. When
I login as the intended user with just user rights, the installer runs
whenever I use outlook or other office apps.

I then removed all of office, rebooted and did a fresh full install. I am
getting the same problem. I have installed office 2003 on about 10 of our
160 machines to test out the suite before doing the full deployment. This is
the first machine to show this behavior. I would like to figure this out
before I have more problems.

Any ideas.

Thanks

Ralph Sharett