BIOS & startup · high

How to fixSECURE_BOOT_RED_SCREEN

Secure Boot Violation Red Warning Screen

What this error means

This high-severity issue affects the hardware BIOS/UEFI. The motherboard BIOS displays a red warning screen stating 'Secure Boot Violation: Invalid signature detected' on boot, blocking startup. It sometimes comes down to unsigned operating system bootloader. See the troubleshooting steps below for the fix.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Disable Secure Boot in BIOS settings temporarily

Disable Secure Boot in BIOS settings temporarily.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Select 'Reset Secure Boot Keys to Default' in BIOS settings

Select 'Reset Secure Boot Keys to Default' in BIOS settings.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Restore the Windows EFI partition

Restore the Windows EFI partition.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Unsigned operating system bootloader
  • Malicious boot loader replacement (rootkit)
  • Outdated bios keys