Microsoft Vs. U.S. Government The Microsoft Corporation (Microsoft) has been under investigation since 1990 for alleged antitrust violations. The Department of Justice (DOJ) feels that Microsoft holds a monopoly in the field of operating systems (OSs), and that Microsoft has made unlawful exercises of monopoly power. The DOJ argues that Microsoft is trying to eliminate the Internet competition by integrating their popular operating system, and using their market power to force distributors into agreements that favor Microsoft over its competitors. Microsoft defends its actions by saying that integrating Internet Explorer