The European Commission has come to an agreement with Microsoft on the manner in which it is to comply with the Commission’s 2004 decision. In the decision, the Commission found that Microsoft abused its dominant position by withholding information on the interoperability with its Windows operating system of work server programmes. Under the new compliance agreement, Microsoft will offer interoperability information in two separate packages: (i) an agreement covering all non-patented open source material for a one-off fee of EUR 10,000; and (ii) a licence agreement for all relevant Microsoft patents against payment of a royalty of 0.4 per cent on the licensee’s product revenues. Private parties will be able to enforce this decision before the High Court in London.