Secure Boot Violation” may display when Secure Boot is enabled in BIOS and attempting to boot into Ubuntu and Debian - ThinkStation - Lenovo Support CH
How to fix Invalid Signature Detected?
Configure UEFI Secure Boot - Oracle® Server X7-2 Service Manual
How to fix Secure Boot Violation in Windows 10
Invalid signature detected" message prompt on every boot up. How do I fix? - CPUs, Motherboards, and Memory - Linus Tech Tips