The European Commission has warned Microsoft that it could face further fines for failing to comply with its anti-trust rulings.

Brussels criticised the software giant for not changing its behaviour since it was fined 497m euros (£331m) in 2004.

In an escalation of its long-running battle with the US firm, Brussels said Microsoft had been seeking unreasonable prices from competitors for key data.

In response, Microsoft said the threat of further fines was unreasonable.
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