Important: Most people try to activate keys without even reading "ACTIVATION INFORMATION", and they face error. We request you to read activation info once, and then contact us if you face any further problem.

WindowsActivationError

If you are facing "0xc004f050" error while activating WINDOWS 10 PRO, then you are having Windows 10 Home not Pro.

Key that you have purchased is not an upgrade key.
So, you need to download windows 10 pro first, install it and then use the key and windows will get successfully activated.

Link For Download With Instructions: https://www.cdkeysdeals.com/faq