How do you select UEFI Boot Mode or Legacy BIOS Boot Mode.
The UEFI firmware settings determines what type of boot devices are available in the boot menu: UEFI, Legacy BIOS (aka CSM), or both types of boot devices.
Normally, you do not need to turn Secure Boot off to install Windows 8/10 in UEFI Boot Mode. If you want to install Windows 7, then you must turn Secure Boot off.
You do not need to change the boot order of drives in your UEFI firmware settings.
- Connect your Windows 7/8/10 USB flash drive or insert your Windows 7/8/10 DVD.
- Restart the computer.
- Press the correct key to enter the boot menu (Esc, F8, F9, F10, F11, F12).
- Select your USB/DVD from the boot menu.
EXAMPLE: Windows 8 64-bit USB flash drive in the Asus motherboard boot menu (see screenshot below).
You may notice a bootable USB flash drive showing twice in the boot menu, one marked UEFI and one not marked UEFI.