Secure Boot Greyed Out in BIOS – Windows 11

Hi all,

I’m trying to enable Secure Boot on Windows 11, but the option is greyed out in BIOS.

System Info:
OS: Windows 11
Boot Mode: UEFI
TPM 2.0: Enabled
Secure Boot: Disabled (and greyed out)

Any ideas on how to fix this?

Thanks!

Tagged: Windows 11

System/ OS Errors

All Replies

Viewing 3 replies - 1 through 3 (of 3 total)

Mira Lennox Lennox

Participant

July 14, 2025 at 11:45 am

Yes, Secure Boot requires the system to be using GPT, not MBR. Also, an outdated BIOS can sometimes cause options like Secure Boot to be greyed out. I’d recommend converting the drive to GPT and updating the BIOS to the latest version.

Toby

Participant

July 14, 2025 at 11:44 am

Does Secure Boot stay greyed out if the system is using MBR or if the BIOS is outdated?

Mira Lennox Lennox

Participant

July 7, 2025 at 11:16 am

If Secure Boot is greyed out in your BIOS, there are a few simple steps you can try. First, enter the BIOS and disable CSM (Compatibility Support Module)—Secure Boot only works when CSM is off. Next, go to the Secure Boot menu and choose “Install Default Keys” or set Secure Boot mode to Standard. If the option is still locked, try setting a BIOS admin or supervisor password under the Security tab, then reboot and check again.

Viewing 3 replies - 1 through 3 (of 3 total)