How do I disable UEFI Secure Boot?

UEFI Secure Boot (Unified Extensible Firmware Interface) is the successor of BIOS (Basic Input Output System) and is used in new 64-bit complete computers with Windows 8 and above.

The standard enabled UEFI runs only signed bootloaders for security reason. Therefore, it is not possible to boot the computer from a CD or USB drive, unless the option is disabled.

Due to the fact that the existing GPT partitions require mandatory UEFI, Windows x64 may not boot after disabling secure boot.

Disable UEFI

  1. Click simultaneously the shortcut Restart + Shift key.


  2. Click Troubleshoot → Advanced options → Start-up Settings → Restart.
  3. Click repeatedly the F10 key (BIOS setup), before the “Startup Menu” opens.
  4. Go to Boot Manager and disable the option Secure Boot.
    • Change the UEFI boot order according to the medium you want to boot the computer.

  5. Save the changes and reboot.
  • 作成日 : 2016年6月16日木曜日
  • 最終更新日時 : 2016年6月23日木曜日
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