Microsoft detailed on Tuesday upgrade paths from old Windows editions to its upcoming Windows 7 OS, saying that Europeans will not be able to directly upgrade from Windows Vista to Windows 7.

Microsoft is expected to ship special versions of Windows 7 to European customers, but the versions will need a clean install on PCs, according to a blog entry on Microsoft's Web site. The software giant has released special editions of Windows 7 in Europe including Windows 7 E, which lacks a browser, and Windows 7 N, which lacks a browser and media player technologies. Windows 7 is scheduled for a worldwide launch on Oct. 22.

More: http://infoworld.com/d/windows/microsoft-outlines-upgrade-paths-windows-7-167

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