The European Union is about to hit Microsoft with fines of €2m (£1.4m) a day over its anti-trust issues in the region, according to sources close to the case. 

EU officials are already believed to have drafted a ruling which claims that Microsoft has not complied with the original 2004 ruling on European competition.

The draft allegedly states that Microsoft has not handed over "complete and accurate" data on Windows to other European software companies.

The decision is expected to be revealed on 12 July and the ruling would be the first ever action by the European Commission against a company that had failed to comply with a previous decision.

The draft proposal is thought to have the support of EU competition commissioner Neelie Kroes, but would need to be backed by the other commissioners. Such backing is usually standard at this stage of the legal proceedings. 

Microsoft insisted that it had followed the previous ruling and that any further action by the EU is unjustified.

"Given that the technical engagement is producing results and that Microsoft has complied fully with every instruction given by the Commission and the trustee, any fine would be unjustified and unnecessary," Horacio Gutierrez, Microsoft's senior lawyer in Europe, told The Financial Times. 

Microsoft is still appealing against the original €497m (£343m) fine for its anti-trust activities and the case is currently with the European Court of First Instance.