Download the Media Creation Tool provided by Microsoft at https://www.microsoft.com/en-us/software-download/windows10. Click on Download Tool Now. Run the installation then choose if you want to keep your files and programs.
After installation is done the PC will show Windows 10 Home. Go to the Activation screen in your PC settings and click on change product key. Enter the new product key to unlock the Pro version of Windows 10.
Go to Start, then Settings, Update & Security, Activation. Click on Change product key. Enter the new product key and the upgrade to Windows 10 Pro will begin.
No. It will ask if you want to keep your files and programs before continuing. Select yes to keep your files and programs. Buy Windows 10 Pro today to upgrade Windows 10 Home to Pro or Windows 7 to Windows 10. Windows 10 Pro download is direct from Microsoft along with Windows 10 Pro activation key. Buy Windows 10 product key and install Microsoft Windows 10 Pro today.
Yours relevent questions answer.