If you have updated or installed Windows 10 Home on your computer and want to upgrade to Windows 10 Pro to try it or prove it , then things became easier. Microsoft has provided everyone with a default Windows 10 Pro product key that anyone can use to upgrade their Windows 10 Home to Windows 10 Pro, for free and immediately. The operating system will be updated, but your copy of Windows 10 Pro will not activate .
How to upgrade for free from Windows 10 Home to Pro
Says Charles from Microsoft,
In Windows 10 Home version 1511, enter the default Windows 10 Pro key in the Change Product Key. VK7JG-NPHTM-C97JM-9MPGT-3V66T This default key will not activate the system, it will only take you to Pro, so you can activate it using a valid Pro key that you provide. When you’re done, the system will go through an upgrade process from Home to Pro, but won’t activate in Pro. You can now enter the Windows 8 Pro key on your Windows 10 Pro system and it will be activated.
The way to do this is as follows:
Open Settings> Update and activate security Change product key. Enter this product key in the space provided:
> Windows 10 Home will be upgraded to Windows 10 Pro. But your copy will not be activated .
You can use the Windows 8 Pro key to activate it, or you can purchase a product license key and enter it to activate it. By clicking the button Go to the store , you will access the file Windows Store , where you can complete the purchase.
When you’re done, you can check the activation status of Windows 10.
This is all the information available for this purpose.