Problems enabling Secure Boot

interstellaflyer

I'm having problem enabling Secure Boot on my home built desktop computer, mother board is an MSI B450M-A Pro, I've followed a couple of videos on youtube and seem to be doing everything correctly and in the right order but in UEFI mode the computer will only boot in to BIOS, if I change back to CSM it boots in to Windows, what I have noticed is that when I select UEFI a drive seems to vanish from the boot priority diagram, Any clues?

debitcardmayhem

Just an idea but have you got an EFI partition on your boot drive?

interstellaflyer

debitcardmayhem said:

Just an idea but have you got an EFI partition on your boot drive?

No it would appear not.

[Deleted User]

You need to convert your hard disk from MBR to GPT to use UEFI. 

There are ways to do this but to be honest a clean install would be preferable then you can take full advantage of secure boot. 

cx6

[Deleted User] said:

You need to convert your hard disk from MBR to GPT to use UEFI. 

There are ways to do this but to be honest a clean install would be preferable then you can take full advantage of secure boot. 

use free minitool partition manager to do this conversion

A_Lert

The Windows installation on your drive will be for BIOS/legacy boot, and won't start in UEFI mode.

The simplest solution is a reinstall. It may be possible to convert an install from BIOS to UEFI but I've not tried it. For Windows, UEFI boot requires both a different disk format (GPT rather than MBR) and an additional EFI partition.