A European Union court on Monday dismissed Microsoft Corp.'s appeal against an EU antitrust order that ordered it to share communications code with rivals and sell a copy of Windows without Media Player. It also upheld a $613 million fine — the largest ever levied by EU regulators. The EU Court of First Instance ruled against Microsoft on both parts of the case, saying the European Commission was correct in concluding that Microsoft was guilty of monopoly abuse in trying to use its power over desktop computers to muscle into server software, the Associated Press reported.