Brussels, 21st February 2008
In its Microsoft judgment of 17 September 2007 the Court of First Instance established clear principles for dominant companies with regard to interoperability disclosures and the tying of separate software products (see MEMO/07/359). In January 2008 the Commission initiated two formal antitrust investigations in order to verify whether Microsoft is complying with the principles established by the Court.
One of these investigations focuses on the alleged illegal refusal by Microsoft to disclose sufficient 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 and on the question whether Microsoft's new file format Office Open XML, as implemented in Office, is sufficiently interoperable with competitors' products.
The second investigation concerns allegations of tying of separate software products, including Internet Explorer, to the Windows PC operating system.
The initiation of proceedings in these investigations does not imply that the Commission has proof of infringements. It only signifies that the Commission will further investigate the cases as a matter of priority.