Install creation is trying to run another file

This has been happening for a while and it's quite annoying...

Every time I compile an installer, just before and just after the code signing sequence I get popup windows about Installing Canon Omnipage driver. Each time I have to click twice to cancel out and continue.

I don't see anything in the logs. I do have Canon Omnipage installed as the scanner driver, but there's no reason that should get into it.

Is there a sequence that I can check?