User Manual
Page 56
Select UEFI Setup Only to disable legacy USB support. 4.3.7 USB Configuration USB Controller Enable or disable all the USB 3.0 ports. If you encounter USB compatibility issues it is recommended to support USB devices under the UEFI setup and Windows/Linux operating systems only. 52 English Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. Intel USB 3.0 Mode Enable or disable all the USB ports.
Select UEFI Setup Only to disable legacy USB support. 4.3.7 USB Configuration USB Controller Enable or disable all the USB 3.0 ports. If you encounter USB compatibility issues it is recommended to support USB devices under the UEFI setup and Windows/Linux operating systems only. 52 English Legacy USB Support Enable or disable Legacy OS Support for USB 2.0 devices. Intel USB 3.0 Mode Enable or disable all the USB ports.