I have jad a consistant problem , whenever I activate word or relative programs, I am receiving an error message "This MSI must be launched through setup. How do I eliminate this?

Here is a specific Norton (Symantec) page:

http://service1.symantec.com/support...=tranus_con_br

Here is a general search on that error:

http://www.google.com/search?sourcei...+through+setup