I distribute a freeware Visual Basic application which uses Wise installer.
It has been install on 10s of thousands of PCs over three years with few
problems.  However, I have one user with Windows XP Pro and Office XP who
has developed a problem.

The freeware app was downloaded and installed and worked properly.

Suddenly, various functions in office, such as clicking on a link in an
email in outlook, or (I think) clicking the save button on Word launches the
application installer.  If we cancel the applicaition install or let it
finish, it does not seem to make a difference, it keeps prompting for the
install.

We have tried to run spyware apps, anti virus scans,
reinstalling/uninstalling the freeware app but the problem will not go away.

We have not tried to reinstall Office or run repair in Office.

Does anyone have any information as too what could be causing this?

Thanks

Stephen