I've actually used this cam many times before and I've never had any problems with it until now. I've tested it on my xbox and it works so its only not working on my PC. When I used a site like Chatroulette.com it used an area of my computer screen as my 'default cam' which was actually kinda cool at first because I was able to show people a youtube video as my chat screen.
I've tried uninstalling then reinstalling the hardware but its still having the same problems. I'm not a computer expert so i'd appreciate if you could give me as much details as possible on how to fix this.