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?
Best Answer
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:
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.