Install Pop OS - how to desactivate in the bios the security boot

 So here is how to Install pop os 20.04 Nvidia Image without headaches.

1. Plugin in boot Stick

2. Move to BIOS (f2)

3. Go to advanced config area (f7)

4. Go to boot section

5. Select secure boot Key Management

6. Go to authorized keys select append

7. Choose No and select all efi Files u can find in boot device

8. Save Changes and Exit

9. Start Installation

10. Now u got a new efi File on your ssd on reeboot u will See some Message Like "can't Boot from .. .. acces denied so you have to Go to BIOS again and add the new efi Files in the ssd Partition to your authorized keys Like u did before with the efi Files of the boot stick, Look for boot.efi and vmlinuz.efi.

11. After completed Installation Install xanmod Like recommended in the original Post.

12. The efi Files in your ssd got Changed again so u have to add them again to your authorized keys.