Verifying shim SBAT data failed:

Hello,

Did You solve the problem ?

Question: My bios settings is locked and i don't know the password. How can i turn off the secure boot or is there another way to fix that issue.

ANSWER: Usually, you can reset the Bios password, by

• halting and unplugging the computer.;
• removing the password jumper on the mother board (search for your specific motherboard);
• plugging and rebooting (without the jumper);
• halting and unplugging the computer;
• resetting the password jumper.

While plugging and starting again you will get access to the Bios setting without a password, as well as setting a new password (which is sometimes mandatory).

ANSWER to turning off secure boot on a HP Z4 G4.

I couldn't disable secure boot since years (look at

https://superuser.com/questions/1775652/windows-11-installed-on-a-refurbished-hp-so-that-i-cant-suppress-secure-boot-mo ), but having installed Fedora which requires a Secure boot I have been able to have dual boot working.

The last Microsoft update was forbidding me to access my Linux server.

The procedure was supposed to be easy by setting "Legacy Enable and Secure boot Disable" instead of "Legacy Disable and Secure Boot Enable" nor "Legacy Disable and Secure Boot Disable". After saving this new bios setting, the computer started again visualizing a 4 digits key to enter.

But after entering this temporary 4 digits, the computer started again but kept the "Legacy Disable and Secure Boot Enable" former setting. The solution has been given last November: https://h30434.www3.hp.com/t5/Desktop-Boot-and-Lockup/Cannot-resolve-quot-Selected-boot-image-did-not-authenticate/td-p/8927047 In fact the 4 digits key was entered wrongly and because the bios does not complain, I couldn't imagine a keyboard issue. As explained in the above link the solution consists in entering the 4 digits on the UPPER LINE of the main keyboard and in lower case (as on an English keyboard)!!

Then it is easy to boot on Linux.

Try pressing the F2 key repeatedly immediately after turning on the power. This should open the BIOS menu. Once the BIOS menu opens, navigate to the security/boot option (it may vary depending on the machine) and locate the "Secure Boot" option. Change it to "disabled". Save the changes.

This might work.

I have the ditto same issue, Dave.

But as you said I did them, but the command said 'Access denied', I did the BIOS turn off to turn pc on but the problem still stays.😐

I just get stuck on the screen I can't get I to bios or anything else. I don't know what to do, I have to finished a project.