You cannot install Windows 11 with Legacy BIOS. Installing in Legacy or CSM mode on a modern UEFI BIOS is like buying a new car and disabling all of the safety and performance features.

So you'd either need to reinstall Windows 10 exactly as I wrote out with illustrated tutorials, install Windows 11 in UEFI mode which I again gave you illustrated tutorials showing how to do this, or if you want to try to convert your present install to UEFI you can try this method:
https://www.windowscentral.com/how-convert-mbr-...

Once you convert the install and enable UEFI mode in BIOS, hopefully Secure boot will be apparent in the BIOS settings.

If not, then again I told you every single step you should make, even provided your BIOS Manual, the latest BIOS Update, how to contact Asus Support or a dozen different Asus forums that can help you with the specific settings in your Asus BIOS, since they are all different.

There is no one else on the web who would have taken the time and effort to do all of this research for you, posted back step by step instructions, each step illustrated by a tutorial explaining how to do it.

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Reddit
reddit.com › r/asusrog › enabled secure boot [windows 11 prep]
r/ASUSROG on Reddit: Enabled Secure Boot [Windows 11 Prep]
October 6, 2021 -

Hello, I'm trying to prep my pc for windows 11.I have a an ASUS Tuf Gaming x570-PLUS (WI-FI) mother board.

I downloaded 'PC Health Check' tool from windows.

I updated my BIOS to v4021. However I'm still getting an error that my 'PC must support Secure Boot'

I double checked in the in BIOS and it looked enabled with the Windows UEFI mode turned on.I've restarted my pc multiple times and still nothing.

Some PC Info:
Motherboard: ASUS Tuf Gaming x570-PLUS (WI-FI) BIOS v4021

Storage: SAMSUNG E 1TB 860 EVO 2.5 SATA3 SSD

CPU: AMD RYZEN 7 3800X WRAITHP

Memory: CRUCIAL 32GB 8X4 D4 3200 CL16 B

Images:

bios

pc health check error
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Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 5519057 › error-enabling-secure-boot-on-asus-tuf-gaming-b550
Error Enabling Secure Boot on ASUS TUF Gaming B550-PLUS WiFi II - Microsoft Q&A
September 8, 2025 - From the boot, install Windows 11. Once the installation is complete, access the BIOS > Secure Boot > change it to active and the mode to standard.
Top answer
1 of 5
23

You cannot install Windows 11 with Legacy BIOS. Installing in Legacy or CSM mode on a modern UEFI BIOS is like buying a new car and disabling all of the safety and performance features.

So you'd either need to reinstall Windows 10 exactly as I wrote out with illustrated tutorials, install Windows 11 in UEFI mode which I again gave you illustrated tutorials showing how to do this, or if you want to try to convert your present install to UEFI you can try this method:
https://www.windowscentral.com/how-convert-mbr-...

Once you convert the install and enable UEFI mode in BIOS, hopefully Secure boot will be apparent in the BIOS settings.

If not, then again I told you every single step you should make, even provided your BIOS Manual, the latest BIOS Update, how to contact Asus Support or a dozen different Asus forums that can help you with the specific settings in your Asus BIOS, since they are all different.

There is no one else on the web who would have taken the time and effort to do all of this research for you, posted back step by step instructions, each step illustrated by a tutorial explaining how to do it.

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2

Hi Alireza. I'm Greg, 10 years awarded Windows MVP, specializing in Installation, Performance, Troubleshooting and Activation, here to help you.

There's a November 2021 BIOS Update here if yours is not updated:

https://www.asus.com/Motherboards-Components/Mo...

Then you can read the Manual here to find out how to enable Secure Boot:

https://www.asus.com/Motherboards-Components/Mo...

If it's still not clear then contact Asus Support to find out how to enable Secure Boot on your BIOS:

https://www.asus.com/support/

You can also ask in Asus forums:

https://blog.feedspot.com/asus_forums/

Is Windows presently installed in UEFI mode, as this can make a big difference in Secure Boot showing up? If you're unsure type System Information in Search, open and look for BIOS mode.

If not installed to UEFI I'd consider reinstalling to UEFI either with WIndows 10 doing this gold standard Clean Install which includes everything that works best in Windows 10: http://answers.microsoft.com/en-us/windows/wiki...

or do a Windows 11 Clean Install:

https://www.groovypost.com/howto/clean-install-...

https://pureinfotech.com/clean-install-windows-11/

Make sure to create the bootable media using Media Creation Tool only, boot the media as a UEFI device, delete all partitions down to Unallocated Space to clear formatting, then select the Unallocated Space and click Next to let the installer create and format the needed partitions - which makes it foolproof.

Feel free to ask back any questions. If you'll report back results for each step it can help determine what else needs to be tried. I will stick with you until it is fixed.

______________________________________________

Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.

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Reddit
reddit.com › r/asustuf › asus tuf trying to enable secure boot for windows 11
r/Asustuf on Reddit: Asus Tuf Trying to enable Secure boot for windows 11
October 28, 2024 -

Hello all, My specs are an asus tuf b550 plus wifi II and a ryzen 7 5800x 8 core. I am having a very difficult time trying to switch legacy to uefi just to enable secure boot in order to update to windows 11. Any help is appreciated as I am totally new to pc. Also any more information i will try to provide as quick as possible. Thank you

Top answer
1 of 2
1

Hi,

Do the following: download PC Check Health, take a screenshot, and post a picture of your PC here:

https://support.microsoft.com/en-us/windows/como-usar-o-aplicativo-verifica%C3%A7%C3%A3o-de-integridade-do-pc-9c8abd9b-03ba-4e67-81ef-36f37caa7844

Thanks

2 of 2
0

Windows 11 requires that the device be UEFI- and Secure Boot–capable, have TPM 2.0, and meet the other minimum hardware requirements (CPU, RAM, storage, graphics, display, and Windows version) before Windows Update or the Installation Assistant will allow the upgrade.

From the described configuration:

  • Firmware TPM 2.0 is enabled and visible in tpm.msc.
  • Secure Boot is enabled in UEFI and reported as active in Windows.

In this situation, the remaining checks to focus on are:

  1. Confirm UEFI (no Legacy/CSM) and Secure Boot mode
    • In UEFI firmware, ensure the system is not booting in Legacy/CSM mode. The firmware must be set to UEFI mode, with Secure Boot capability enabled. Some systems allow both Legacy and UEFI; in that case, UEFI must be the first or only option.
    • If needed, use the Windows path to UEFI settings:
      1. Open Settings > System > Recovery.
      2. Under Advanced startup, select Restart now.
      3. On the blue screen, select Troubleshoot > Advanced options > UEFI Firmware Settings and then Restart.
    • In the firmware menus, verify that Secure Boot is enabled and that the system is booting in UEFI mode, not Legacy/CSM.
  2. Verify all Windows 11 minimum requirements
    • Storage: At least a 64 GB or larger storage device must be present.
    • System firmware: UEFI and Secure Boot capable (already configured, but must be recognized as such by Windows).
    • TPM: TPM 2.0 (already confirmed via tpm.msc).
    • Graphics: DirectX 12–compatible with WDDM 2.0 driver.
    • Display: 720p or higher, >9" diagonal, 8 bits per color channel.
    • Windows version: The current OS must be Windows 10, version 2004 or later, to upgrade via Windows Update.
  3. Use firmware menus to confirm boot mode
    • If there is still doubt about the boot mode, use the firmware boot menu to see how the OS drive is listed. For example, entries like UEFI: indicate UEFI mode. If only BIOS/Legacy entries appear, the system may still be in Legacy mode, which will block Windows 11.

If any of these checks fail (for example, the system is actually booting in Legacy/CSM mode or the current Windows 10 version is older than 2004), Windows Update and the Installation Assistant will continue to report that the device does not meet requirements even if TPM 2.0 and Secure Boot appear active.


References:

  • Windows 11 System Requirements
  • Windows 11 and Secure Boot
  • Boot to UEFI Mode or legacy BIOS mode
Find elsewhere
🌐
Gentoo Forums
forums.gentoo.org › board index › assistance › kernel & hardware
[solved] Secure Boot disabled: Asus Tuf Gaming motherboard - Gentoo Forums
May 5, 2025 - There is a "Secure Boot state" line that is not editable. It says either "User" or "Setup." Deleting the PK puts the Secure Boot state into Setup. After loading a PK, it returns to User. The two main choices are "OS Type: Windows UEFI Mode/Other OS" and "Secure Boot Mode: Standard/Custom."
Top answer
1 of 5
4

1

You can create a bootable USB on an 8GB USB flash drive:

Click this link:

https://www.microsoft.com/en-us/software-downlo...

to download the Media Creation Tool (Click on Download Tool Now), with that you can download the latest Windows 10 ISO (Select Create Installation Media for Another PC), you can create a bootable USB flash drive (min 8GB) using that tool

2

To convert the drive to GPT, use these steps at the start of the installation, and please note, this process will delete all partitions and data from the drive.

At the very start of the Installation Process, press Shift + F10, or Shift + Fn + F10 to open Command Prompt

Run this command and hit Enter:

diskpart

Run this command and hit Enter:

list disk

(Make note of the disk number you want to convert and enter it into the next command - replace X)

Run this command and hit Enter:

select disk X

Run this command and hit Enter:

clean

Run this command and hit Enter:

convert gpt

Then close Command Prompt

2 of 5
2

Thank you for the screenshot.

The problem is your Windows 10 is installed in Legacy BIOS, and to be able to enable Secure Boot and TPM, you would need to switch to UEFI BIOS

You cannot do that, because your drive has an MBR partition style and UEFI BIOS requires a GPT partition style on the drive.

It is a big job to convert to UEFI, there are two methods.

1

Backup your personal files, then clean install Windows 10 form a bootable USB and before doing that you will need to change BIOS to UEFI and convert the drive form MBR to GPT, which would wipe all data on the drive.

2

You can try to convert the drive without data loss from MBR to GPT using the tool that Microsoft provide, then boot into BIOS and switch to UEFI Mode

Before you attempt to do this, please backup your personal files.

https://docs.microsoft.com/en-us/windows/deploy...

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TikTok
tiktok.com › discover › how-to-activate-secure-boot-on-tuf-gaming
How to Activate Secure Boot on Tuf Gaming | TikTok
4 weeks ago - Learn how to enable Secure Boot on TUF Gaming motherboards for improved system security and better gaming performance.See more videos about How to Disable Secure Boot on Asus Rog Strix, How to Enable Secure Boot on A Dell, How to Enable Vanguard Uefi Secure Boot, How to Enable Secure Boot on Hp, How to Enable Secure Boot Hoengager, How to Enable Secure Boot in Hp.
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JustAnswer
justanswer.com › software › qn3fy-need-turn-secure-boot-windows-11-asus.html
I need to turn on secure boot for windows 11. I have a asus tuff motherboard and a ryzen 7 8 core processor. How do I
November 22, 2024 - To enable Secure Boot on an ASUS TUF motherboard, enter the BIOS by pressing DEL during startup. Navigate to the 'Boot' tab, find 'Secure Boot,' and set it to 'Enabled.' Ensure 'CSM' (Compatibility Support Module) is disabled to activate Secure Boot.
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JustAnswer
justanswer.com › computer › r8uar-asus-590-tuff-gaming-m-i-m-trying-disable.html
Fix Greyed Out Secure Boot on Asus 590 Tuff - Q&A
To disable Secure Boot on the Asus TUF Gaming B590M motherboard, first set an administrator password in BIOS. This unlocks Secure Boot settings. Then, navigate to the Secure Boot menu and change the OS type from 'Windows UEFI mode' to 'Other OS.'
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Reddit
reddit.com › r/pcmasterrace › [deleted by user]
[deleted by user] : r/pcmasterrace
January 22, 2024 - Verify that the Windows Boot Manager is the first boot option and not the drive itself. Alternatively, install 11 from a flash drive made with Rufus, which can disable the hardware compatibility check. ... Hello, how did you solve the problem? Unfortunately I have the same problem now.
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Activision Support
support.activision.com › articles › trusted-platform-module-and-secure-boot
Trusted Platform Module (TPM) 2.0 and Secure Boot for Call of Duty
April 30, 2026 - Together, they provide a stronger foundation for in-game security and work alongside RICOCHET™ Anti-Cheat to keep matches fair and fun. TPM 2.0 is available for Windows 10 but is required for Windows 11, so enabling both features ensures your ...
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Reddit
reddit.com › r/asus › problems with enabling secure boot on asus tuf f15 fx506hc-hn006
r/ASUS on Reddit: Problems with enabling Secure Boot on ASUS TUF F15 FX506HC-HN006
October 9, 2021 -

I am having problems with enabling secure boot on my device. I have Windows 11 installed and I wish to play Valorant, but Riot is forcing that on Windows 11 TPM 2.0 and secure boot are both enabled. I do have TPM 2.0 but I cannot enable secure boot and I do not know why.

I've been searching and every single article I've read is showing how to enable secure boot to install Windows 11. I've tried everything in my BIOS but I can't enable it.

Any kind of help will be appreaciated.

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ASUS
asus.com › support › faq › 1055973
[Motherboard]Fix FPS Game Launch Errors: Enable Secure Boot and Update TPM 2.0 (fTPM) on Windows PCs | Official Support | ASUS Global
That means two things must be true on your PC: Secure Boot is enabled and TPM 2.0 (on AMD, "fTPM") is present and up-to-date. Here are the requirements and how to check them. If either item is missing or outdated, games may refuse to start or display error codes during launch. A. Before You Begin: Requirements & Self-Check ... 2. In System Summary, verify BIOS Mode = UEFI and you can also look for Secure Boot State here, if Secure Boot State = On (or Off if not yet enabled).
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Reddit
reddit.com › r › ASUS › comments › st4u8z › asus_x570_tuf_gaming_plus_wifi_secure_bootwindows
ASUS X570 TUF Gaming Plus WiFi (Secure Boot/Windows ...
February 15, 2022 - Ich habe auch das BIOS auf den neuesten Stand gebracht (das gleiche Problem bleibt bestehen, da keine bootfähigen Geräte gefunden wurden), wo es heißt, dass für Windows 11 nichts getan werden sollte.
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Asus
rog-forum.asus.com › t5 › asus-software › windows-11-can-t-activate-secure-boot › td-p › 835536
Windows 11 - Can't activate secure boot - Republic of Gamers Forum - 835536
March 5, 2024 - Hey, I have Rog gu501gm, I updated my laptop to Windows 11, and now some games dosent work anymore, for example: My TPM 2.0 is enable, so the problem probably is the secure mode, but I can't do any changes over there to enable it. This is my options when Im in the bios menu: Thank you! ... Check if you need to convert MBR to GPT: https://www.howtogeek.com/245610/how-to-check-if-a-disk-uses-gpt-or-mbr-and-how-to-convert-between-t... Secure Boot requires GPT
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TroubleChute Hub
hub.tcno.co › security › boot › tuf
Enable Secure Boot, TPM and UEFI on ASUS TUF | TroubleChute Hub
October 2, 2025 - Head back to the Boot tab at the top of your screen ... Make sure OS Type is set to Windows UEFI Mode instead of Other OS. This will enable Secure Boot.