[REQUEST] Lenovo IdeaPad U310 & U410 (65CNxxWW) BIOS Unlock

[Numismate42]

Hey guys
I have been working hard to switch that laptop to Ubuntu.
First I had to understand how to update and flash the bios to which I HAD NO access. It is done, I can get inside.
Of course I wanted to disable the secure boot, this was the reason to enter BIOS.
The issue I am facing is that one : except the two first boxes, I cannot toggle the secure boot ones, they are grayed. I understood reading the forums that lenovo likes these kind of locks. Here then is my request...
If anyone wanted to unlock the secure boot on this BIOS, I would be very grateful. I long for Ubuntu...
Thank you...

I was flashing this bios : https://download.lenovo.com/consumer/mob...cn99ww.exe

ps : I was trying what I read about the "golden key secure boot" but this was rejected also by the secure boot...