Update widows 10 home edition to professional using the default key

Open Settings > Update & Security Activation Change Product key. Enter this product key in the provided space:
VK7JG-NPHTM-C97JM-9MPGT-3V66T


Your Windows 10 Home will get upgraded to Windows 10 Pro. But your copy will not be activated.
You can use your Windows 8 Pro key to activate it or you can buy a product license key and enter it to get it activated. Clicking on the Go to Store button will take you to the Windows Store, where you can complete your purchase.

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