I do not see any option in the BIOS to enable/disable USB Booting unless you have specifically excluded it from the Startup >> Boot list (at the top with the --> preceding it), so make sure that you are creating your Windows 10 Installation media using Microsoft's Media Creation Tool (see link below) and then tap F12 at startup to access the Boot Menu to select your USB drive.
Create Windows 10 installation media
https://www.microsoft.com/en-us/software-download/windows10
How to: Perform a Clean Install or Reinstall of Windows 10
https://answers.microsoft.com/en-us/insider/forum/all/how-to-perform-a-clean-install-or-reinstall-of/aef0ae63-2117-41ee-a8ea-4a3181625b08
FYI If you purchased the system without the Windows OS, it will probably NOT have a license key imbedded in the BIOS, so if not you will need to purchase a Windows 10 License. You might still be able to upgrade from Windows 7 if you have an older license, but I have not tried that in several months.
Regards,