A small but important fact uncovered during the Microsoft European antitrust case could form the basis of a settlement.
RealNetworks, which makes the music and video playing program Real One Player, showed how Windows XP Embedded, a simplified version of the operating system which is licensed only for industrial use, can function as an operating system without Microsoft Media Player attached, according to three people present at the closed-door hearing who asked not to be named.
Microsoft has argued that removing Media Player would harm the way Windows works. It also claimed Windows XP Embedded is not a full operating system.
"It is designed for single-purpose use, such as running ATMs," said Microsoft spokeswoman Tiffany Steckler.
The European Commission told Microsoft in August that it must either extract Media Player from the operating system and sell it as a standalone product, or it must insert a rival player into Windows to sit alongside its own player, to restore fair competition among music and video players such as Media player, Real One and Apple Computer's QuickTime.
On Friday, using a laptop computer hooked up to three giant monitors, RealNetworks showed an audience of more than 100 European competition regulators, opponents and Microsoft itself how easily Windows XP Embedded runs without the media player. It also showed how Real One Player, its own media player, worked on the specialist version of XP.
"It was a 'gotcha' moment," said one person present, adding: "Everyone was impressed, there was a lot of nodding heads and hands to chins."
He compared with to a similar moment during the antitrust case in the US, when a witness demonstrated how Windows can work without having the Microsoft browser, Internet Explorer, attached. "Microsoft insisted that Windows would be harmed by having its browser removed too," he added.
Microsoft's lawyers made reference to RealNetworks' demonstration during their summing up at the end of the three-day hearing, another person present said. "Someone on the Microsoft team dismissed the demonstration as false, but they still acknowledged it as one of the more important points made during the hearing."
Settlement talks between Microsoft and the commission are likely to begin in earnest this week. After the demonstration on Friday the commission is expected to push Microsoft towards offering to license two types of operating system to European PC manufacturers: one with Media Player, and one without.
People at the hearing said that If Microsoft offered to license a stripped-down version of Windows, like XP Embedded, to the mass computer market to sell alongside its existing Windows XP, which contains programs such as Media Player, there could be grounds for a settlement.
One version of Windows with Media Player and another without would allow PC manufacturers to offer their customers a choice: the Microsoft package or an a la carte package containing competitors' software.
"If the stripped-down version is sold at a big enough discount to the bundled version to allow room for a profit margin for competing media players then that might well be enough for the European Commission," said a person present at last week's hearing.
RealNetworks and Microsoft were unavailable to comment. One person familiar with RealNetworks' position said that Microsoft has already tilted the market for media players so far in its favour that additional remedies may be needed.
RealNetworks is understood to be arguing that Microsoft should also carry a competitor's product alongside its own in the bundled version.
There is also a question about marketing. If the bundled version of Windows XP operating system continues to benefit from lavish ads, then the unbundled version should be promoted too.
All the hearing attendees contacted said they were doubtful whether Microsoft would willingly agree to license a second, unbundled version of Windows to the PC market.
"Today Media Player is the issue. Tomorrow it might be Instant Messenger or Outlook. This sets too big a precedent, and creates, potentially, too great a challenge to Microsoft's plans for Windows," said one.
Meanwhile, more progress was made on the second competition problem the commission has identified. In its August statement of objection, the commission accused Microsoft of competing unfairly in the market for small servers costing less than $25,000.
Sun Microsystems complained to the commission in 1998 that Microsoft was giving its own server software an advantage over competitors by withholding information about Windows from them. Microsoft has a 55% share of the market for small servers in Europe, according to researcher IDC.
One person in the hearing said Microsoft agreed to reveal enough about Windows to make it fully interoperable with rivals' server software. "Sun is likely to get what it wants," the person said.
Microsoft repeated assurances made by its senior counsel Brad Smith the previous day that it wanted to settle the case before the commission rules. It described the hearing as "a positive step towards a meaningful solution".
"Microsoft recognises that as an industry leader it has a special responsibility to consumers, the industry and the commission to work things out," it said, adding that it sees "opportunities to narrow the differences" between itself and its opponents in the industry.
Paul Meller writes for IDG News Service