The Longhorn edition of Microsoft's Windows operating system is at least two years away--but the company is revealing some details on how it intends to create a smooth transition from today's Windows PCs.

One of the most significant enhancements to Longhorn is a data storage system called WinFS, technology designed to make information easier to find and view. Clearing up long-standing confusion, a Microsoft senior vice president said that WinFS will work with--not replace--the existing file system in Windows, called NTFS, when WinFS debuts in late 2005 or 2006.

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