Cant use native UEFI with Secureboot

[OrionExodus]

Hey everyone i tried to install win11 with the official workaround from microsoft for older devices. Now TPM 1.2 and CPU are being ignored as it should, but ive got problems with activating secureboot. Everytime i enable UEFI without CSM and secureboot it seems like everything breaks and no matter what i do i cant boot anything. Tried it with a usb stick with win11 which has been made with rufus and also windows Media creation tool. I always only get this screen: 

https://ibb.co/YR85927

[Paul_Tikkanen]

Hi:

Use my workaround to make a bootable USB W11 installation flash drive with Rufus.

You have to use the version of Rufus I attached in the discussion (v3.18).

https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Issues-upgrading-to-windows-11... 

Set up the Rufus menu exactly as you see it in the illustration for Windows installations.

Boot the Installer from the EFI USB boot source, not the legacy one.

Then you should be able to turn on the secure boot setting in the BIOS.

[OrionExodus · Accepted solution]

Spoiler

Spoiler

I could get it done with booting into recovery section then open cmd terminal. And use mbr2gpt.exe to validate and then convert to gpt after that uefi without csm and secureboot was working.