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How I “fixed” the Windows 10 activation error 0xcf – Microsoft Community
The Windows license is automatically transferred and reactivated.
Windows 10 activation error 0xCF
You entered a product key that can’t be used to activate Windows 10 enterprises. This is the source of my information. For more info, see Activation in Windows Regular Windows updates are supposed to fix problems, but often the update process itself presents problems or fails to launch. If the reply is useful for you, please accept as answer. Report abuse. Too technical.