Microsoft will be charged for failing to comply with a 2009 ruling ordering it to offer a choice of web browsers, the European Union’s antitrust chief said on Thursday, which could mean a hefty fine for the company. U.S.-based Microsoft’s more than decade-long battle with the European Commission has already landed it with fines totaling more than a billion euros ($1.28 billion). The Commission, which opened an investigation into the issue in July, is now preparing formal charges against the company, EU Competition Commissioner Joaquin Almunia said.