No Supported Camera Detected And Dell I Have A Webcam Installed In My Laptop But My Computer Cant Find It?

I have a webcam installed in my laptop but my computer cant find it? - no supported camera detected and dell

I installed a webcam on my Dell laptop, I went to a video screen and say, "No supported camera detected. Plug to continue." What is the problem and how can I solve this problem?
Thank you for your help in advance!