To enable Secure Boot in Windows 11, you'll need to access your computer's BIOS/UEFI settings and make sure your system is using UEFI mode, not Legacy BIOS. Here are the steps:

How to Enable Secure Boot

• Open the Start Menu, search for "System Information," and check the “Secure Boot State” and “BIOS Mode.” Secure Boot can only be enabled if BIOS Mode is set to UEFI—not Legacy.

• If needed, convert your disk from MBR to GPT before switching to UEFI via tools like Command Prompt (mbr2gpt /convert /allowFullOS). Always back up your files first.

• Restart your computer: Hold the Shift key as you click Restart from the Start menu. This boots your PC into the Windows Recovery Environment.

• Navigate through Troubleshoot > Advanced Options > UEFI Firmware Settings > Restart. Your system will enter the BIOS/UEFI menu.

• In BIOS/UEFI, find the Secure Boot option—often found in the Boot or Security tab—and switch it to Enabled. If you don't see the option, make sure CSM (Compatibility Support Module) is disabled first.

• Save changes (usually by pressing F10), then exit and restart. After rebooting into Windows, re-check "System Information": Secure Boot should be enabled.

Additional Tips

• Older computers may lack Secure Boot support. Always check manufacturer documentation for the correct function key (F2, Delete, ESC, etc.) to access BIOS/UEFI.

• If your system is not eligible or fails to enable Secure Boot, update your BIOS/UEFI firmware or consult your computer manufacturer.

Following these steps will help you securely enable Secure Boot on Windows 11 and enhance your system's security compliance.