License information a focus of scrutiny.

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Microsoft may not be doing enough to comply with a European Union antitrust order to license information to competitors, an EU spokesman said.

The European Commission, the EU’s Brussels-based regulatory arm, last month said it is asking retailers and computer makers whether measures proposed by Microsoft to comply with the EU order are effective.

“There are strong doubts about their compliance with interoperability remedies, based on market tests,” commission spokesman Jonathan Todd said in a telephone interview yesterday. The EU is still evaluating whether Microsoft is complying with an order to sell a version of its Windows product without a music and video player, Todd said.

Microsoft was fined a record $664 million by former Competition Commissioner Mario Monti, who accused the company of using its more than 95 percent share of the market for personal-computer operating systems to dominate related markets for media players and servers. The company is appealing the decision.

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“We remain committed to working with the commission,” Microsoft spokesman Tom Brookes said in an interview. The company is studying the commission’s conclusions on its compliance, he said.

Todd said the commission’s research found that obtaining technical documentation from Microsoft, which is necessary before deciding whether to buy a license, is “very difficult.” The level of the royalties to license the information are also “unjustified,” he said.

If the commission decides Microsoft isn’t doing enough, the company could be fined as much as 5 percent of its daily revenue, the commission said.