If at all possible, you should install error handling and return codes into your UPnP application. Then, if KarBOOM tries to run the application but the application crashes, KarBOOM can notify the user that he has the wrong version of the C++ redistributable. Even if the user doesn't understand what that means, he will at least understand that the problem lies in his own computer, and not KarBOOM.

And in my opinion, this will help lessen their initial impression that KarBOOM is bug-ridden software.