I have a ASUS machine, I want to install Fedora from USB (but it does not work with UEFI) Can you tell me how to disable it? I tried everything, and it did not

I have a ASUS machine, I want to install Fedora from USB (but it does not work with UEFI) Can you tell me how to disable it? I tried everything, and it did not worked... Yes, the BIOS does have a option to disable secure boot there, but even using that option, secure boot still stays active and refuse to boot anything unsigned.