Hi Roughfit and welcome to our community
By chance has other software been installed recently? I ask,
because I've seen where Captivate as well as RoboHelp and who knows
which other products have a similar issue. Essentially what happens
is that when starting the application (Captivate or RoboHelp in
this case) the Windows Installer utility kicks off. And sometimes
it's the result of another installation gone sour somehow.
Wishing I had more to offer. I did Google the error you
reported and found some references to generic Windows stuff and
Microsoft.
I sincerely wish you the best of luck in sorting it all
out... Rick