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Microsoft's new Vista OS makes world debut

Microsoft's new Vista OS makes world debut
Microsoft's new operating system, Vista, has gone on sale in 70 countries after being launched on Tuesday. Only about 15% of existing computers, though, are powerful enough to run the premium version.

Expanding memory will cost users an extra 20%, according to market researchers.

A coalition of Microsoft's competitors – ECIs – say Microsoft is trying to extend its market dominance. They are calling on EU regulators to clamp down on existing Microsoft monopolies.

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