If not and if it says GVLK as channel of the product key it means that the device was activated via a fake KMS server. SO you need to do the following: run a command prompt with this written slmgr.vbs /upk
If not and if it says GVLK as channel of the product key it means that the device was activated via a fake KMS server. SO you need to do the following: run a command prompt with this written slmgr.vbs /upk