Microsoft Monday said users testing Vista should abandon that effort for the Windows 7 RC candidate.

Bill Veghte, senior vice president for the Windows business, said during his keynote address at the annual TechEd Conference that Windows 7 RC should be the platform for users planning a client operating system migration.

Veghte said users that are already deploying Windows Vista, which first shipped in November 2006, should continue with those efforts. "Your investment will be protected, " he said, though he did not define what that protection entails.

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