Antitrust: Commission initiates formal investigations against Microsoft in two cases of suspected abuse of dominant market position

The European Commission has decided to initiate two formal antitrust investigations against Microsoft Corp concerning two separate categories of alleged infringements of EC Treaty rules on abuse of a dominant market position (Article 82). The first case where proceedings have been opened is in the field of interoperability in relation to a complaint by the European Committee for Interoperable Systems (ECIS). The second area where proceedings have been opened is in the field of tying of separate software products following inter alia a complaint by Opera.

As regards interoperability, in its Microsoft judgment of 17 September 2007, the Court of First Instance confirmed the principles that must be respected by dominant companies as regards interoperability disclosures. In the complaint by ECIS, Microsoft is alleged to have illegally refused to disclose interoperability information across a broad range of products, including information related to its Office suite, a number of its server products, and also in relation to the so called .NET Framework. The Commission's examination will therefore focus on all these areas, including the question whether Microsoft's new file format Office Open XML, as implemented in Office, is sufficiently interoperable with competitors' products.