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Question about Secure Boot in BIOS for BF6

Question about Secure Boot in BIOS for BF6

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RileyCoop57
Junior Member
22
01-15-2025, 01:17 AM
#1
So currently I am running a Asus Rog strix B-450F MOBO. My last BIOS update was a couple years ago. The issue is not being able to switch to UEFI, and without it, Windows won't boot. Currently, it will only boot when in UEFI and Legacy. So would updating my BIOS to its latest version possibly fix this issue, or is there more behind it? I can change it all to the correct settings, I just can not boot after doing so.
I am also using MBR and not GPT. I attempted the change through CMD but it failed because I am not in UEFI.
So could a simple update fix this perhaps?
R
RileyCoop57
01-15-2025, 01:17 AM #1

So currently I am running a Asus Rog strix B-450F MOBO. My last BIOS update was a couple years ago. The issue is not being able to switch to UEFI, and without it, Windows won't boot. Currently, it will only boot when in UEFI and Legacy. So would updating my BIOS to its latest version possibly fix this issue, or is there more behind it? I can change it all to the correct settings, I just can not boot after doing so.
I am also using MBR and not GPT. I attempted the change through CMD but it failed because I am not in UEFI.
So could a simple update fix this perhaps?

A
ACFreak13
Junior Member
11
01-15-2025, 02:54 AM
#2
Unfortunately not. MBR needs legacy support aka CSM and CSM must be turned off for Secure Boot. There are some tools to convert MBR to GPT, but I haven't used them before. Someone here might be able to help.
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ACFreak13
01-15-2025, 02:54 AM #2

Unfortunately not. MBR needs legacy support aka CSM and CSM must be turned off for Secure Boot. There are some tools to convert MBR to GPT, but I haven't used them before. Someone here might be able to help.

1
12YearOlds
Junior Member
34
01-15-2025, 07:20 AM
#3
It’s possible to use a third-party partition manager to switch to GPT without issues. I didn’t run into problems with the native Windows setup or DiskGenius. I’m not familiar with every tool, but EaseUS Todo started free in Windows 7 and they moved to a subscription later. They occasionally offer alternatives for the old PQ partition method after years of reliance. If you have a Samsung drive, the Samsung Magician Migration Wizard might work. I didn’t need it since DiskGenius was sufficient. You could run the app on a bootable USB, which can be used inside Windows or as an alternative. There seems to be a convert-to-GPT option somewhere in the app. If you don’t have the ability to enable partition management, consider a clean install guide.

When the BIOS starts in Windows 10, it installs partitions silently in MBR mode. If CSM is off (UEFI enabled), it uses GPT mode. It’s straightforward. There’s also a Clean Install guide for Windows 11 in the forum.

Cleaning and purging all partitions requires careful planning, as you must already have a solid backup strategy to ensure data safety. Since my main use is for Steam games, I only need to worry about emails and saved games that aren’t compatible with Steam Cloud.

Back up to a storage medium, secure the backup, and store copies in safe, protected locations. This is the best you can achieve for reliable data protection.
1
12YearOlds
01-15-2025, 07:20 AM #3

It’s possible to use a third-party partition manager to switch to GPT without issues. I didn’t run into problems with the native Windows setup or DiskGenius. I’m not familiar with every tool, but EaseUS Todo started free in Windows 7 and they moved to a subscription later. They occasionally offer alternatives for the old PQ partition method after years of reliance. If you have a Samsung drive, the Samsung Magician Migration Wizard might work. I didn’t need it since DiskGenius was sufficient. You could run the app on a bootable USB, which can be used inside Windows or as an alternative. There seems to be a convert-to-GPT option somewhere in the app. If you don’t have the ability to enable partition management, consider a clean install guide.

When the BIOS starts in Windows 10, it installs partitions silently in MBR mode. If CSM is off (UEFI enabled), it uses GPT mode. It’s straightforward. There’s also a Clean Install guide for Windows 11 in the forum.

Cleaning and purging all partitions requires careful planning, as you must already have a solid backup strategy to ensure data safety. Since my main use is for Steam games, I only need to worry about emails and saved games that aren’t compatible with Steam Cloud.

Back up to a storage medium, secure the backup, and store copies in safe, protected locations. This is the best you can achieve for reliable data protection.

T
TamedWolfy
Member
156
01-15-2025, 09:43 AM
#4
So last night I almost ended my operating system by using CMD mbr2gpt, but my WINRE.wim file disappeared. After restarting it didn’t boot Windows. Now I’m considering a fresh installation. The new question is, should I just install Windows 11 with UEFI and that would work?
T
TamedWolfy
01-15-2025, 09:43 AM #4

So last night I almost ended my operating system by using CMD mbr2gpt, but my WINRE.wim file disappeared. After restarting it didn’t boot Windows. Now I’m considering a fresh installation. The new question is, should I just install Windows 11 with UEFI and that would work?

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noahsent
Member
150
01-15-2025, 10:06 AM
#5
I figured it out by doing what worked for me. I linked the digital license to Windows 10, changed the hardware, and signed in via MS/AC using Windows Start. Then I upgraded to Windows 11, did a clean install, and activated the new version by signing in again. You could also clean a Windows 10 installation without CSM, which would install GPT partitions and let you run the Windows 11 installer from the MS/AC web page. It’s just a logical process, no skipping steps. I didn’t realize MBR2GPT would be so confusing until it was needed. Disk Genius might have been better, but sometimes the extra steps are worth it. The way people handle their licenses is unclear to me—most just link MS/AC and sign in, then upgrade. It seems the goal was always to get Windows to install on a GPT partition.
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noahsent
01-15-2025, 10:06 AM #5

I figured it out by doing what worked for me. I linked the digital license to Windows 10, changed the hardware, and signed in via MS/AC using Windows Start. Then I upgraded to Windows 11, did a clean install, and activated the new version by signing in again. You could also clean a Windows 10 installation without CSM, which would install GPT partitions and let you run the Windows 11 installer from the MS/AC web page. It’s just a logical process, no skipping steps. I didn’t realize MBR2GPT would be so confusing until it was needed. Disk Genius might have been better, but sometimes the extra steps are worth it. The way people handle their licenses is unclear to me—most just link MS/AC and sign in, then upgrade. It seems the goal was always to get Windows to install on a GPT partition.

J
JR_GAMER07
Posting Freak
915
01-29-2025, 08:03 PM
#6
Perform a clean installation.
Ensure only one drive is connected.
Wipe the OS drive (this deletes all data and partitions).
Use diskpart to clean the drive (press Shift+F10 after booting from the Windows install media).
Follow these steps:
When installing from the media, select UEFI boot mode.
J
JR_GAMER07
01-29-2025, 08:03 PM #6

Perform a clean installation.
Ensure only one drive is connected.
Wipe the OS drive (this deletes all data and partitions).
Use diskpart to clean the drive (press Shift+F10 after booting from the Windows install media).
Follow these steps:
When installing from the media, select UEFI boot mode.

A
Anson1108
Member
102
02-15-2025, 01:18 AM
#7
Begin by entering the bios, configure it for UEFi, activate Secure boot and fTPM options.
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Anson1108
02-15-2025, 01:18 AM #7

Begin by entering the bios, configure it for UEFi, activate Secure boot and fTPM options.