This means that your webcam is not working then you are installing the driver that was not supported by it then what you are to do i this:
then logon to your the manufacturer webite and putin the model of your system then the webcam software just type and click search it will bring either for XP or VISTA then choose the one you are using and click on download ok at finish run the software am sure you will laugh back it happens to someone here with me that solves the problem ok