Abstract: A method for preventing computer device fraud utilizing mobile device characteristics in a computer system is disclosed. Digital media content, such as music, games and applications (“apps”) are widely available with the popularity of mobile computing. Advertisers of such digital media content may utilize incentives to users of mobile computer devices to download the digital media content, but want to prevent fraud on the system. In one method, usage information may be collected from user devices and be utilized to track and determine fraud on the system from individual devices, where the individual device is then blocked from access to the incentives.