How to check firmware in Windows
When building WindowsPE-based boot environment on a USB hard disk device, you need to select the boot type (EFI boot/BIOS boot).
Please take the following operating procedures to check the firmware.
1) Log in by using the Administrator account and launch the command prompt.
2) Run bcdedit.
3) You can check the boot type with the binary name in path under Windows boot loader.
EFI：winload.efi or bootmgfw.efi
BIOS：bootmgr or winload.exe
– ActiveImage Protector 2018