Enabling Secure Boot on an MSI motherboard requires booting into the BIOS/UEFI and adjusting a few settings. Here’s a straightforward, widely applicable guide. If you need steps tailored to your exact MSI model, tell me your motherboard model and BIOS version and I’ll tailor the instructions. Direct steps to turn on Secure Boot on MSI BIOS

• Prepare your system
  • Ensure your Windows installation drive is GPT formatted. Secure Boot requires GPT for the OS drive in most configurations. If Windows was installed in legacy BIOS with MBR, you may need to convert or reinstall with UEFI+GPT.
• Enter the MSI BIOS/UEFI
  • Reboot the PC and repeatedly press the Delete key (or F2 on some models) during startup to enter the MSI BIOS/UEFI.
  • If you’re in Easy Mode, switch to Advanced Mode (often by pressing F7 or selecting Advanced at the top of the screen). You need Advanced/UEFI mode for Secure Boot options.
• Disable CSM (Compatibility Support Module)
  • Navigate to the Settings or Advanced tab.
  • Find the CSM/CSM Compatibility or “CSM” option and set it to Disabled. Secure Boot requires CSM disabled on most systems. If you changed this, save and proceed to the next steps.
• Enable Secure Boot
  • Still in the BIOS, go to Security or Boot configuration.
  • Find Secure Boot and set the System Mode (or similar) to Standard or User (depending on BIOS wording). If the current mode is Setup, switch to Standard/User (the exact labels vary by model).
  • If prompted about loading factory defaults, accept as needed to apply changes.
• Enable TPM/TRUSTED PLATFORM MODULE (optional)
  • Some MSI boards expose TPM under Security, or Trusted Computing.
  • Ensure TPM/Found Key (TCM) is Enabled if your OS and applications require it. If you already enabled Secure Boot, TPM is usually enabled automatically or can be enabled here.
• Save and exit
  • Save changes and reboot. Re-enter BIOS to verify that Secure Boot shows as Enabled and that TPM (if shown) is active.
• Verify in Windows (optional)
  • After Windows boots, you can confirm Secure Boot status by pressing Windows key + R, typing msinfo32, and checking the Secure Boot State in the System Information window. It should read “On.”

Notes and caveats

• If Windows was installed in Legacy BIOS with MBR, enabling Secure Boot might prevent the system from booting until Windows is converted to UEFI with GPT. In some cases, you’ll need to reinstall Windows in UEFI mode or convert the drive to GPT and reinstall or repair Windows.
• Some MSI models show Secure Boot as “Windows UEFI mode” or “OS Type” with options like “Other OS” or “Windows UEFI mode.” Choose the Windows UEFI/UEFI mode and ensure CSM is disabled for Secure Boot to operate.
• If Secure Boot options are grayed out or unavailable, verify that:
  • The system is in UEFI mode (not Legacy/CSM).
  • The OS drive is formatted as GPT.
  • TPM is present and enabled if the motherboard requires it for Secure Boot.

If you share your exact MSI motherboard model (for example, MPG Z690 Carbon WiFi, MAG B660 Tomahawk, etc.), the precise menu names and ordering can be provided, along with model-specific screenshots and a confirmation checklist.