Fix We can’t activate Windows on this device as we can’t connect to your organization’s activation server, Error code 0x8007007B on Windows 11/10.

Activation error 0xC004F074, The Key Management Server (KMS) is unavailable OR No Key Management Service (KMS) could be contacted can be fixed using this method.

A bug in what appears to be the Microsoft Windows activation service is causing Windows 10 Pro licenses to be downgraded to Windows 10 Home and then stating that Windows is not activated.