Has anyone ever seen this error before?! I got this error on a fresh install. I got this error the moment Microsoft tried to validate and was stuck with it. Thinking it was a bad install I formatted and I used KMS to activate and that only worked temporarily as soon as I updated it rebooted with that error again. Once the error presents itself I can no longer user windows. Forget trying to login, it boots into this screen that reads this message. edit: Should clarify that originally I upgraded for free, but fell back into using kms as I kept getting that message. No idea how Microsoft thinks I violated the agreement, except that I did tweak my setting to remove all the spying they include in Windows 10. I don't think that violates the agreement and I'm more concerned how they would or could track such a thing if that was the reason.