But the ACTIVATION description didnt work for me:
To activate this game, you must upgrade the OS to Windows 10. (correct)
Install Hola VPN Chrome Extension and run it with Argentina region (incorrect / didnt work)
Just started my real vpn the Argentina region (Buenos Aires) (works fine).
After this you can follow the discription.
Update Windows: http://www.windows.com/windows10upgrade
Activate the key here: https://redeem.microsoft.com/
Code is valid so positive thumb ;).