Error code: activate windows go to settings to activate windows, If its a retail store bought license or OEM System builder disc, then the product key should have been included in the package. If it wasn’t included, then you need to contact
If you don’t find the product key, then you will need to purchase a new one.
You should buy new license for your computer:
Click Start > Settings > Update & security > Activation > Change the product key then enter the new product key then click Next to Activate
If you are unable to activate Windows 10 after all the above and you are certain you have the correct edition installed, then please attempt phone activation:
Activate Your Windows 10 License via Microsoft Chat Support