

If the OEM key is not accepted, then first try using the Windows 10 Pro product key that Microsoft has provided for users wanting to upgrade their systems. Press WINDOWS+R on your keyboard to open the Run window, and type slui.exe then click OK Try entering your Windows 10 Pro product key in the dialog box as shown. Is Windows 10 OEM home upgrade to pro possible?

In other words, even if you have an activated copy of Windows 10 Home edition, you need to purchase the upgrade license and activate the install before or after upgrading to Pro edition.

Upgrade from Windows 10 Home edition to Pro edition is not free. If you don't have a product key or a digital license, you can buy Windows 10 Pro from Microsoft Store. To upgrade from Windows 10 Home to Windows 10 Pro and activate your device, you'll need a valid product key or a digital license for Windows 10 Pro. Can you upgrade from Windows 10 home to pro? Microsoft's case for calling Windows 10 S faster isn't to do with raw optimizations to the OS it's to do with how the user is able to use the OS over time. Saying Windows 10 S is faster than Windows 10 Pro is like saying Windows 10 Pro is faster than Windows 10 Home when we all know that isn't the case.
