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This will also make installing previous versions of windows impossible no?

• bru 15y ago
  ... and installing next versions too. You won't be able to install the next version of Windows on your computer : you will have to buy a new one.
  • mappu 15y ago
    Not necessarily, new versions of windows could ship signed with the same key. You could install previous versions of Windows the same way if, for instance, there was a windows update or new service pack integrated with the install media that contained a signed kernel.