Cannot remove Secure boot

[clessard]

I cannot remove sure boot. When I do, the PC reboots without secure boot. I have found an answer: turn on display post messages in the bios. And then turn of  secure boot. Save and exit. The Bios will show a message like: "a Secure boot turnoff is pending. Type the folowing caracters and then ENTER at the keyboard. After that the secure boot option is turned off.

That's it. Hope it help someone.

[clessard · Accepted solution]

Sorry the PC reboot with secure boot before I found an answer !