Select the Secure Boot Mode setting and select Standard: Secure Boot Mode standardCustom would allow us to set the keys used for attestation for Secure Boot. If you have no idea whether youвЂ™re booting from BIOS or UEFI, open the System Information app and check the BIOS Mode setting: System InformationOnce you disable CSM Support, youвЂ™ll notice a Secure Boot setting has appeared: Secure Boot settingsWhen you click into that Setting, youвЂ™ll be given the option to enable Secure Boot: Secure Boot settingsBut before we can just hit enable, first we need to configure the Secure Boot mode. After running that tool, just be sure to go back into your motherboard settings to Boot from the disk you just converted. If thatвЂ™s the case, Microsoft has a command line tool called MBR2GPT, which you can run to convert your disk from BIOS to UEFI. Meaning if you disable the CSM Support setting you wonвЂ™t be able to boot into your OS. Get KEK and DB from.Quick aside вЂ“ if you were booting from BIOS instead of UEFI, you were actively using this CSM Support setting.

Prepare your devices for Windows 11 by enabling Secure Boot and Firmware TPM 0 comments | 19. The final step before enabling Secure Boot is actually saving all our settings and restarting, because we need to boot the machine with CSM disabled before we can enable Secure Boot.

Windows Update Secure Boot