What is a downgrade?
To Microsoft, “downgrade” describes the licensing rights it grants to older operating systems. Downgrade doesn’t mean the process for rolling back Windows from Vista to XP, since there isn’t such a procedure, not in the generally accepted use of “upgrade.” In an older-to-newer move, developers usually make it possible to retain all the digital detritus on the drive, from already-installed applications and Word documents to iTunes tracks and family photos, while updating the system files. Not so in a downgrade. Specifically, these downgrade rights lets owners of some versions of Vista replace it with Windows XP without having to pay for another license. In effect, the license for Vista is transferred to XP. Think of it as a swap, Vista for XP, not as an extra license. By Microsoft’s end-user licensing agreement (EULA), you can’t have both the Vista and its downgraded XP installed at the same time on the same or different machines. You have to pick: It’s one or the other. To the vast bul
