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I've downloaded a Kali Linux ISO and used Rufus to burn it to my 8 GB USB.

When I reboot my PC and it boots up from the USB this message pops up:

invalid signature detected. check secure boot policy in setup

It reboots again and says "there's no boot device".

How do I resolve this?

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  • Does the computer currently have Windows installed?
    – etnguyen03
    Aug 3, 2017 at 15:01
  • no, linux ubuntu but the same thing happens on my windows 10 pc
    – eelex
    Aug 3, 2017 at 15:06

2 Answers 2

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Boot into UEFI Firmware Settings and disable Secure Boot.

  1. Go into a terminal and run systemctl reboot --firmware-setup. The system will reboot into UEFI Firmware Settings
  2. Find the secure boot option (usually under boot or something like that)
  3. Disable it
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Sounds like you should disable secure boot in the BIOS.

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