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Once your webcam is in use, you can’t use your webcam on other application such as MSN or Yahoo chat. You’ll have to quit the application that is using your webcam first, then only you can use your webcam on other application. For example, your webcam is your home’s CCTV and you want to start a video chat with your friend on Windows Live Messenger. You have to shut down the CCTV software first then only you can start the video chat or else you will get an e