Microsoft has appealed an €899m fine, calling the amount 'excessive', according to Reuters.
The company appealed the fine in the EU General Court in Luxembourg on Tuesday, said Reuters.
European Commission competition spokeswoman Amelia Torres confirmed the venue and appeal to ZDNet UK on Tuesday, but declined to comment further.
The European Commission fined Microsoft the record €899m (£784m) in 2008 for non-payment of an earlier €497m antitrust fine. The original fine was imposed in 2004 over interoperability.