Opera Software Chief Technology Officer Hakon Wium Lie attends a press conference at the Residence Palace in Brussels, Wednesday Dec. 16, 2009. The European Union has dropped long-standing antitrust charges against Microsoft Corp. after the company agreed to give users of the Windows operating system a choice of up to 12 other Web browsers. Under the terms of the deal with regulators announced Wednesday, Microsoft will avoid further EU fines if it provides a pop-up screen that lets European users from March replace Microsoft's Internet Explorer or add another browser such as Mozilla's Firefox or Google's Chrome. Internet Explorer is used by a majority of global internet users.