Computer powers on Legacy BIOS boots / initializes DUET boots from the USB stick DUET executes UEFI Shell UEFI Shell loads generic NvmExpressDxe-64.efi driver and remaps system block devices UEFI Shell now sees Windows 10 hidden FAT partition DIRECTLY on the NVMe UEFI Shell executes Windows 10 UEFI bootloader from that hidden NVMe FAT partion directly (\EFI\Boot\Bootx64.efi image) Windows 10 is now booting and is in full control of your computer (under UEFI mode, of course)