At the same time, a few new issues emerged in fiscal year Microsoft had infringed European competition law, and the lawsuit filed by RealNetworks, Inc. Update on the U.S. Federal Antitrust Suit Since U.S. District Court Judge Jackson issued his conclusions of law in the antitrust suit filed against Microsoft in 1998 by the U.S. Department of Justice, 20 states and the District of Columbia, a number of private lawsuits have been filed related to the findings in that case.