The world's largest software company (Microsoft) can't write an operating system that permits this, and I was told that I needed to reinstall the operating system. I called the VLSC and they told me that the installation from HP could not be upgraded.
Check the product key and try again, or enter a different one. The error I receive is 'The product key you entered didn't work. I tried inputting the VLSC key on the factory installation by changing the product key. I also have valid VLSC MAK (not KMS) keys for our Active Directory domain / Microsoft Windows 10 Professional. I have a new HP PC (super nice Spectre 13 inch 2-in-1!!) that came with Microsoft Windows 10 Home.