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On a homebrew computer I've installed a Intel DX79SR Mainboard, changed the BIOS mode to UEFI and installed Windows 8.

I further switched UEFI to fast booting, which works nicely.

Now I wanted to boot into the UEFI firmware settings from Windows 8, but the option to do so is missing from the advanced boot options. Instead of the 6 advanced Options as described in this article I only see 5. The UEFI Option is missing.

Luckily the mainboard itself has a rescue option, but I wonder how I get Windows 8 to recognize my UEFI bios? Shouldn't it be possible to boot into the UEFI settings from Windows itself?

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1 Answer 1

If you installed Windows 8 the U/EFI way you should be able to access UEFI options.

To check if you boot UEFI way - when in Windows run on admin command prompt:

bcdedit

output lists bootmgr and loader/s.

for example:

    Windows Boot Loader
 =========================

identifier              {current}
device                  partition=C:
path                    \Windows\system32\winload.efi
description             Windows 8

If path ends in .efi - you boot U/EFI way

else path ends in .exe - you boot BIOS way.


To install Windows 8 the UEFI way you have to boot installation media (USB/DVD) the UEFI way.

UEFI firmware usually allows BIOS booting (over CSM) and UEFI booting for DVD/USB.

Destination disk for installation must be a GPT style disk.

When converting a MBR disk to GPT disk (usually) existing partitions are lost.

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Mine had .efi bit still the UEFI option is missing as described in the question –  CodeBlend Oct 2 '13 at 11:56

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