This problem is common, so it’s already covered by the Activation troubleshooter.
Licensing restriction – In the majority of cases, this error code is thrown due to your Os believing that it’s dealing with a case of licensing restriction.
But keep in mind that this will only work if your license key is valid. A lot of users reports that we’re unable to activate their Windows 10 copy reported that the procedure was finally successful after they retried the process a couple of times.
Busy Microsoft Activation servers – As it turns out, this particular error code often occurs whenever the activation servers are busy or undergoing a maintenance period.