Microsoft bought 10 percent of RealNetworks in July. But former Federal Trade Commission member Christine Varney, who will also speak at the Nader conference, said that bringing a case against Microsoft would be difficult if not impossible. "The government is extremely reluctant to interfere with the market - and with the company that is seen as the driver of economic recovery in the United States," Varney said, adding that she was "very concerned" with Microsoft's business tactics. Only a small percentage of Justice Department antitrust investigations are nonmerger, and in those cases, it is very difficult to prove intent to seize and hold onto market share, Varney said. Showing that Microsoft is trying to hold onto a monopoly based on the Internet Explorer giveaway may be unfeasible when Netscape controls 60 percent to 80 percent of the market share, Varney said. "We don't need a jihad," Varney said.