My old mobo would refuse to accept NVRAM changes, overwrite them at boot or something, then hardcoded try to launch the windows bootloader from the ESP. I had t

My old mobo would refuse to accept NVRAM changes, overwrite them at boot or something, then hardcoded try to launch the windows bootloader from the ESP. I had to trick it by naming my bootloader the same thing as the Windows bootloader. Signing new things for secure boot didn't work at all but luckily it could be disabled. This was an MSI motherboard in case anyone's wondering.