New
#330
Go to the activation window under settings, updates and security. Change product key to the Windows 10 Pro generic product key:
VK7JG-NPHTM-C97JM-9MPGT-3V66T
Let it upgrade to Pro. You should be activated by digital entitlement. If not, go back to the same screen, change the product key again to your Windows 8 Pro product key to activate it.