UEFI Firmware Settings. 5. Navigate to the Authentication, Boot, or Security tab in your BIOS. 6. Once in the BIOS, under the Boot menu, drag, and move drive Windows Boot Manager up to be the ...

It then checks the OS bootloader's digital signature to ensure that it's trusted by the Secure Boot policy and hasn't been tampered with. Secure Boot is built into the UEFI—short for Unified ...