Hello.
The Windows 10 free upgrade ended on July 29, 2016.
You can only perform a clean install of Win10, you need to purchase a legal license from the Microsoft Store or an authorized retailer to activate the system.
Before installing Win10, please make sure that the computer hardware meets the minimum system requirements, please refer to:
More details please refer to this link:
Best Regards,
Hania Lian
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