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" The family pack covers those moving from XP or Vista to Windows 7. Microsoft noted in some of its communications that the family pack is available "while supplies last." Given that Microsoft would seem to be in a position to make as many boxes as it wants, I pressed the software maker to understand how limited this offer will be. A company representative would only say that it is a new offer that Microsoft is testing and declined to elaborate on the time frame or the number of copies it was limited to."