If you get the ‘Processor not supported’ message, it’s because your CPU needs to support Execute Disable Bit. You should now be able to install Windows 10. Follow the wizard through as before and re-create the installation media. Right-click it and select Run as Administrator.
To change that, download the Windows 10 Media Creation Tool and locate it on your hard disk. The second option is that you’re trying to install Windows from a USB flash drive or DVD, but you created the installation media without the proper permissions.