Why Does The Built In Webcam Of My Toshiba Laptop Not Work

I tried opening it via Skype, and it says “No webcam found. Connect your webcam or check it’s connect properly”. I’ve had no luck trying to use it from Facebook or YouTube, either.

I looked into the start-up menus, as well (the one that’s F2 when turning on the laptop). The webcam says that it’s still enabled. My webcam is very important to me to be able to use. Please help :(