How can I fix a Secure Boot violation error?

Make sure you have Secure Boot and UEFI enabled. Clearing the Secure Boot keys might also do the trick.

There's a setting in the BIOS that needs to be enabled for Secure Boot. Have you checked if that's already active? It looks like it is since it's detecting violations, but it's worth confirming.

You might want to check if Secure Boot is set for the Windows Boot Manager. Keeping it set to custom can help you manage the keys better and potentially solve the issue.

It's interesting that people suggest enabling Secure Boot when the error itself indicates some kind of issue. This could mean something in your system, likely your OS, doesn't match what your hardware expects. A Windows update might not have applied correctly, or you could be dealing with malware. To really fix the problem, you have two choices:

1. Turn off Secure Boot (not recommended) — it’ll allow you to boot, but won’t fix the underlying issue.

2. Reinstall your OS — it’s a hassle, but it’s a much better way to address the root problem without compromising your system security.

I've dealt with a similar problem before. Changing my hardware seemed to trigger it. Updating my BIOS helped, and that reset my Secure Boot keys to valid, which fixed the issue for me.