The European Commission is to consult Microsoft’s rivals on whether the company has complied with last year’s anti-trust ruling over the way Windows is built and sold.
In addition to fining the company following anti-competition complaints against Microsoft, the EC ordered Microsoft to provide a version of Windows that did not contain a bundled version of its Media Player.
It also ordered Microsoft to make code available to rival software developers to allow them to make alternative Windows applications more easily.
Microsoft agreed to these requests at the end of last year, but Microsoft still hasn’t made the alternative version of Windows commercially available.
The company and the commission have been in dispute over Microsoft’s plan to call the new operating system "Windows Reduced Media".
The EC believes such a brand name would make it harder for PC suppliers to promote it, which would, in turn, make it harder for other media player providers to get their alternative players into the market.