As with Win7, Win8.1, Microsoft also provides a way to upgrade systems in the WIN10 version of the system, and you can click "Add" in the properties and enter a newer version of the key to complete the system upgrade. However, Microsoft believes that this is not obvious enough, in Win10 's first major update, Microsoft improved the system upgrade mechanism, you can change the product key in the modern settings application, directly enter the Professional Edition key to complete the upgrade. Specifically as follows:
1, open Settings-Update and security-activation
▲ The screenshot has been upgraded
2, click "Replacement Product Key"
You can start the upgrade by entering the following key:
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Special note: The key provided in this article is for upgrades only, not for system activation, you need to resolve the activation problem yourself. In addition, this method only applies to WIN10 's first major update (1511) and later versions of the system, which you can view in Settings-system-about: