Hi there. This normally happens when you do not have the driver installed for it.
To fix this , type up you ASUS laptop model number on google followed by
Webcam Driver. Once the driver has been found, download and install it. Restart your Laptop and it should work.
Here is the ASUS website and simply filter by model number.
http://support.asus.com/download/Options.aspx?SLanguage=en&type=1Rate and Comment, thank you.
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