On 23 March 2004 the European Commission adopted a decision finding that Microsoft had infringed Article 82 of the EC Treaty by abusing its dominant position by engaging in two separate types of conduct. The Commission also imposed a fine of more than EUR 497 million on Microsoft.
The first type of conduct found to constitute an abuse consisted in Microsoft’s refusal to supply its competitors with ‘interoperability information’ and to authorise them to use that information to develop and distribute products competing with its own products on the work group server operating system market, between October 1998 and the date of adoption of the decision. By way of remedy, the Commission required Microsoft to disclose the ‘specifications’ of its client/server and server/server communication protocols to any undertaking wishing to develop and distribute work group server operating systems.
The second type of conduct to which the Commission took exception was the tying of Windows Media Player with the Windows PC operating system. The Commission considered that that practice affected competition on the media player market. By way of remedy, the Commission required Microsoft to offer for sale a version of Windows without Windows Media Player.
In order to assist the Commission in monitoring Microsoft’s compliance with the decision, the decision provided for a monitoring trustee to be appointed by the Commission from a list of persons drawn up by Microsoft. The monitoring trustee’s primary responsibility would be to issue opinions, upon application by a third party or by the Commission, or on his own motion, on whether Microsoft was complying with the decision and on any issue that might be of interest with respect to the enforcement of the decision. He was to have access to Microsoft’s assistance, information, documents, premises and employees and to the source code of the relevant Microsoft products. All the costs associated with the monitoring trustee, including his remuneration, were to be borne by Microsoft.