secure boot cannot enable

1. Check Boot Mode:
   
   • Ensure your system is in UEFI mode, not Legacy BIOS. Secure Boot needs UEFI.
2. Enable CSM (Compatibility Support Module):
   
   • In the BIOS, find BootBoot Menu.
   • Disable CSMCSM if it’s enabled.
3. Set Secure Boot Keys:
   
   • Go back to the SecuritySecurity tab.
   • Select Secure Boot ControlSecure Boot Control and set it to EnabledEnabled.
   • Choose Key ManagementKey Management and install default Secure Boot keys if needed (often labeled “Install Default Secure Boot Keys”).

1. Save and Exit BIOS.
2. Enter BIOS Again after the reboot.
3. Check Secure Boot Again, it should now be available to enable.

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