UEFI Secure Boot preventing OS launch
4.5
The PC fails to boot into Linux or an older version of Windows due to security signatures.
Symptoms
- "Secure Boot Violation"
- Red warning box
- Boot loop
Possible Causes
- Unsigned bootloader
- Expired security keys
- Custom OS installation
Step-by-Step Fix
1
Disable Secure Boot
Enter BIOS/UEFI and set Secure Boot to "Disabled".
2
Install Keys
Use the "Install Default Secure Boot Keys" option in BIOS.
3
Use Signed Bootloader
Ensure your OS distribution supports Secure Boot.
When to See a Technician
Secure Boot is a security feature, but it can be a headache for dual-booting Linux.
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