The European Commission has imposed a record penalty payment on Microsoft, amounting to EUR 899 million, for Microsoft’s failure to comply with the Commission’s March 2004 Decision. In that Decision, the Commission found that Microsoft had abused its dominant position and so required the company to disclose Windows interface documentation at a reasonable price. The Commission’s 2004 Decision was upheld by the European Court in September 2007 and Microsoft reduced the price charged for the disclosure of the relevant information in October 2007. However, the Commission has now found that the prices charged by Microsoft for this documentation prior to October 2007 were unreasonable.