Secure Boot Violation” may display when Secure Boot is enabled in BIOS and attempting to boot into Ubuntu and Debian - ThinkStation - Lenovo Support CH
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How to enable TPM and Secure Boot in BIOS for Windows 11 - Pureinfotech
Restoring UEFI boot entry via motherboard replacement or BIOS update - Thomas-Krenn-Wiki
Windows 10 | Invalid signature detected. Check Secure Boot Policy - Microsoft Community
Fix Invalid Signature Detected Check Secure Boot Policy in Setup || Windows 10 - YouTube