| Problem | Solution | |---------|----------| | Option greyed out in BIOS | Disable first, or set OS Type to “Windows UEFI mode” | | Windows 11 won’t boot after disabling | Re-enable Secure Boot or reinstall Windows 11 (not recommended to run without it) | | BitLocker asks for recovery key | Enter 48‑digit recovery key (saved in Microsoft account or printout) |

If disabling Secure Boot is necessary for a specific task (such as installing a specific Linux distribution), it is best practice to re-enable Secure Boot immediately after the task is completed to restore the device's security posture.