I'm running Windows 11 on an ASUS PRIME A320M-K motherboard, and Windows is installed in UEFI mode. System Information reports that Secure Boot is disabled, but the firmware settings appear to show it as enabled. Both of my SSDs are partitioned as GPT.
The problem happens when I change the firmware's OS Type setting from "Other OS" to "UEFI Mode." After saving and restarting, I get a red warning screen and the computer will not boot until I switch the setting back. I need Secure Boot working for games such as Valorant and League of Legends. What should I check or change to fix this?
3 Answers
Confirming GPT is important, but the asterisk shown by DiskPart’s `list disk` command only confirms the disks’ partition style. It doesn’t prove that the active Windows installation has a working UEFI boot entry. In the firmware boot menu, look specifically for a `Windows Boot Manager` entry, and consider rebuilding the EFI boot files if it is absent or damaged.
Try setting the system to UEFI mode while leaving Secure Boot disabled. If Windows boots normally, repair or reinitialize the Secure Boot configuration from there, then enable Secure Boot afterward. Make sure Windows Boot Manager is the selected boot entry rather than choosing the SSD directly.
The red warning can indicate that the Windows bootloader or Secure Boot certificates don’t match what the firmware expects. Check the motherboard’s Secure Boot or key-management settings and restore the factory/default Secure Boot keys if they’re missing or corrupted. The motherboard model and firmware interface should also be verified, since the hardware was identified as ASUS while the BIOS was described as Gigabyte.
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