I really want to try out elementary os. I made a bootable USB on both Rufus and etcher. Both give me the same results. I get a blue screen saying Verification failed: (0x1A) Security Violation. I have turned off secure boot. If I press ok I see on the lower left side flash quickly:

Failed to load image: Security Policy Violation Failed to open \EFI\BOOT\mmx64.efi - Not Found Failed to load image \EFI\BOOT\mmx64.efi: Not Found start_image() returned Not Found

Anyone know how I can get around this?


1 Answer 1


You will need to disable 'Secure Boot' in your machine's BIOS settings.

  • +1 This done it. I have try rename the grub64.efi to mmx64.efi but when boot from usb, it will show error that grub64.efi not found. Trying rename back mmx64 tu grub64 and disable from bios under Security -> Secured Boot Menu, the usb boot without any error.
    – Luiey
    Jan 5, 2021 at 16:07

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