Office 2003 will not display thesaurus results

[Herbssat]

I was troubleshooting a client's computer today that lost the thesaurus feature. At first it lost the feature altogether and after inserting my office disc it came back but with no results. The windows installer would also try to keep installing the feature and components when you typed in a word into the text block. I tried repairing, uninstalling and reinstalling office to no avail so there is most likely some third party app that is interfering. I did not have the time to go in and shut down services and etc.... Anybody got any suggestions as everything else in the program is working.