The European Commission has fined Microsoft €280.5m for its failure to comply with a landmark 2004 competition ruling.
The tough new penalty is the first of its kind and comes on top of a record €497m fine the commission imposed on Microsoft in March 2004 for abusing its dominant position.
The fine covers the period from 16 December last year, the deadline set by EU regulators for Microsoft to make available key information to rivals, to 20 June. It was computed by multiplying 187 days of violations by €1.5m a day.
'Microsoft has still not put an end to its illegal conduct. I have no alternative but to levy penalty payments for this continued non-compliance,' Competition Commissioner Neelie Kroes said.