• Please see here for the installation method. How to clean install Windows 10

① License authentication (input of product key)

Windows is not activated Windows cannot be activated on this device because you do not have a valid digital license or product key. Entering Your Product Key You can find your product key in the email you received from the Windows vendor or provider, or in the package that came with your Windows DVD or USB. Windows is activated This Windows has been activated.

Check product key

② License activation (Microsoft store)

At the bottom, click “Windows is not activated. Activate Windows now.” Activation Windows is not activated Windows cannot be activated on this device because you do not have a valid digital license or product key.

Activate Windows 10Change your Windows 10 license user name or organization nameCheck your Windows 10 product keyUpgrade from Windows 10 Home to ProWindows 10 Activate Office 365Windows 10 settings and usageSummary