I had windows 8.1 and updating to 10 failed so badly I needed to operate a complete reinstall of windows. However, I could not get the upgrade to work, so I had installed windows 10 and attempted to activate using the 8.1 key. This hasn't worked. How do I get windows to accept the installation on the 8.1 key?try one of these articles: https://support.microsoft.com/en-us/...-10-activationhttps://support.microsoft.com/en-us/...ivation-errors
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