How to enable/disable Secure Boot in UEFI MB?

1. Legacy BIOS is no supported Secure Boot. 
2. Go to check the MB whether it has below item and choose "Windows UEFI Mode" , then save the config (The Secure Boot will be enable after reboot the system). The Secure Boot Check will be enable. If a UEFI driver or Option ROM is not able to work in this time that it has not gotten the secure boot sign from MS.
3. Choose "Other OS" the Secure Boot will be disable.