Since the official launch of Windows 10, which came as upgrade “free” al Windows 7, Windows 8 and Windows 8.1, many confusions have been created related to product activation. Windows Genuine. Microsoft did not provide exact explanations of either How can it be installed “clean” the new Windows 10 (Clean install Windows 10) and not about Windows 10 activation process, for those who had bought a Windows 7 License, Windows 8 or of Windows 8.1.
Last days Microsoft has launched the largest update So far for Windows 10. Update that changes some important features and functionalities of the operating system. Among the changes / news of the most recent update, are the activation process. Following the update we have the possibility of Change of the series for Windows 10or to introduce a Windows 7, 8, 8.1 series. This new option helps us a lot when installing a clean Windows 10.

Schimabrea of the Windows 10 series can be done from Settings > Upgrade & Security > Activation > Change product key.
For Windows 10 activation you can use any series you have received when buying the Windows 7, Windows 8 or Windows 8.1.
 
			