Google sources said last year that its international rival, Microsoft, has a hand in two of the original complaints by Ciao and Foundem. Microsoft owns Ciao.
In the E.U. Google controls more than 80 percent of the online search market. The company already faces separate antitrust inquiries in Italy, Germany and France. The Commission can fine companies up to 10 percent of their global turnover for breaching E.U. rules.
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