Hi Paul,
That's not an error message that's baked into Affixa anywhere, I'm afraid.
The message doesn't mean anything to me generally either, sorry.
I've just done a quick Google and it seems to be something to do with the "Interactive Service Detection" Windows Service. It appears to be something whereby a Windows Service can send some kind of message to a GUI. Affixa doesn't do anything like this, I'm afraid, and doesn't have a Windows Service.
Sorry - not sure where you need to go with this next.
Chris