S12 Mini pro Secure Boot change back to disabled.

leersie

I have purchased a S12 Mini pro and I changed Secure Boot to enabled.
Now I get an Secure Boot violation message ‘invalid signature detected. Check secure boot policy in setup’
In the secure boot menu all the options are greyed out, so I cannot change the setting back to secure boot disabled….
I researched the internet for a fix, but nothing works for me. Is there anything that you can help me with to fix this issue? Image description

support13

leersie
Please restore the default value

Clear BIOS

May I ask what version of your BIOS is? Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. Please send us a picture of the Main page, we will check if you need to update the BIOS.

leersie

That is version 2.22.1293
BIOS information
BIOS vendor: American megatrends
BIOS version: MINISF003
Build date and time: 03/31/2025
access level: administrator

support13

leersie
Thank you for your reply.

Please send us the SN picture of the machine.

We will confirm with the R&D personnel whether there is a BIOS to solve the PKfail problem of the machine MINI S13.

leersie

Image description

support13

leersie
Thank you for your reply.

We have already given feedback to the R&D personnel.

We will notify you in time if there are any updates.

support13

leersie
Hi there,
You can solve it by updating the BIOS.
The new BIOS has been sent to you via private message.
Please check it.

leersie

When I’m at step 4 of the Bios updating tutorial, it doesn’t allow me to re-start via the USB.
The same message appears: secure boot violation, invalid signature detected. check the secure boot policy in Setup… and it brings me back to the Aptio setup menu.
It seems I cannot access the flash drive in this way…

support13

leersie
Sorry, we have already reported this issue to the R&D personnel.
We will notify you if there are any updates.