Things will be easier if you’ve upgraded or installed Windows 10 Home on your PC and wish to test or test Windows 10 Pro.
Microsoft has made the default product key for Windows 10 Pro available, allowing anyone to upgrade from Windows 10 Home to Windows 10 Pro for free. Although the operating system is updated, the copy of the Windows 10 Pro that is installed is not active.
Default product key to update Windows 10 Home to Pro
Says Charles of Microsoft,
Windows 10 Home beats version 1511, type the default key for Windows 10 Pro while changing the product replacement. VK7JG-NPHTM-C97JM-9MPGT-3V66T This default key does not activate the system, it just takes the Pro, so you can activate a valid Pro key that you specify. After you perform this operation, the system passes through an upgrade process with Home to Pro, but the Pro is not activated. You can enter the Windows 8 Pro key into Windows 10 Pro and it will be activated.
Here’s how to do this:
Open the settings menu and select Update and Security Activation. Replace the product key. Fill in the blanks with the following product key:
The operating system Windows 10 Home will be upgraded to Windows 10 Pro. However, the instance is not running. To activate Windows 8 Pro, either use the Windows 8 Pro key or purchase the product license key and enter it. To make a purchase, click the Go To Store button on the Windows Store button.
After that, you may check the status of your Windows 10 activation. This is the most up-to-date information available.