Annoying Installer at Startup

> Hi,
>
> I have an annoying installer at startup - comes up with message saying it
> is
> installing an app (sonic activation module - whatever that is!!).
>
> If I click cancel it then goes on to do something else and then prompts me
> with a message stating it cannot find the source file (activate.msi).
>
> I need to click cancel several times - each time it seems to repeat the
> process.
>
> Eventually it does cancel. Anyone any suggestions as to what I can try??
>
> Mark