Having trouble activating Windows 10? Try these steps to resolve activation errors:
Activation failed because this device doesn't have a valid digital entitlement or product key, 0xC004F074, 0x8007007B
Confirm that your device is up to date and running Windows 10, version 1607 or later. Learn how to update Windows 10.
Use the Activation troubleshooter to resolve simple errors. See the following instructions for more details.
If you're still seeing an error, check the list of error codes below and follow the suggested steps to resolve it.
Make sure the error hasn't changed. Sometimes when you run the Activation troubleshooter or attempt to activate, the error code and message will change. If it has changed, look up the new code below and follow the recommended steps.
This tutorial will apply for computers, laptops, desktops,and tablets running the Windows 10 operating system (Home, Professional, Enterprise, Education) from all supported hardware manufactures, like Dell, HP, Acer, Asus, Toshiba,Lenovo, and Samsung).