Windows 8.1 pro license for version 8.1
Windows 8.1 pro license for version 8.1
You can use the 8.1 PRO key you purchased from G2a.com with Windows 8.1 Purple case CD. It should recognize the key and allow an upgrade or clean installation. Make sure you have the correct .ISO file for your version. This setup will work for a fresh boot from USB. Let me know if you need further help!
Windows 8.1 and Windows 8.1 Pro are distinct versions. Upgrading from 8.1 to Pro requires having the OS already installed and obtaining the 8.1 Pro ISO for installation.