Secure Boot Violation - Invalid Signature Detected. Check Secure Boot Policy in Setup

[amriison1156e02e0]

I am currently dealing with a frustrating BIOS issue on my MSI Modern 14 B4MW. It all started because I was concerned about my laptop's performance, it had been crashing occasionally, and Valorant was acting up. I opened the BIOS just to see if anything looked out of place, but I didn't actually change any settings. However, when I hit F10 to save and exit, I was immediately blocked by an error message 'Secure Boot Violation - Invalid Signature Detected. Check Secure Boot Policy in Setup.'

To try and bypass this, I experimented with the boot settings by switching from UEFI to 'UEFI with CSM.' When that didn't work and the 'Invalid Signature' error persisted, I reverted everything to the original settings. After researching the issue on YouTube and Google, I went into the Security tab and disabled 'Secure Boot Support.' This finally allowed me to boot into Windows, but it created a new problem: Valorant refused to launch. Since the game's anti-cheat (Vanguard) strictly requires Secure Boot to be enabled on Windows 11, I was stuck in a loop.

I went back into the BIOS to try a specific fix I found online. The tutorial suggested changing the Secure Boot Mode to [Custom] so I could manually reset the security signatures. According to the guide, I was supposed to see an option to 'Enroll All Factory Default Keys' once I switched to Custom mode, but that option is completely missing from my menu. Now, I’m at a dead end, I have to keep Secure Boot disabled just to use my laptop at all, which unfortunately means I still can't play Valorant. Can you please help me figure out how to fix this?

 

[zamottra160102ec]

I'm having the same issue, except I do have "Install all factory default keys" but selecting this has still not allowed me to boot without disabling secure boot.

This started after updating my BIOS on a Crosshair 15 A11UEK. Though the cause of our problems might be different, hopefully someone might have some insight that can help

 

[ericj159802e9]

It's not a problem I am familiar with. First thing that comes to mind is to flash the BIOS again and see whether that helps.

On a search I found two promising solutions at Microsoft Learn with the second solution an AI generated one: https://learn.microsoft.com/en-us/a...ating-safe-boot-gives-invalid-signature-detec .

 

[zamottra160102ec]

Thank you for your response. That Microsoft Learn step was one I had come across and hadn't yet tried but MSI support was able to point me to the below link, which resolved this issue for me: https://www.msi.com/faq/faq-11370 .

OP, I hope this might help your situation as well.

One thing to note, is to make sure the boot64.exe file is saved to your flash drive in the EFI>Boot folder. Probably an obvious thing, but it didn't work for me originally because I had the boot64 file dropped directly into my USB drive, not within the EFI folder as downloaded.

 

[ashishbisht15january1234158e02da]

Thank you for your response. That Microsoft Learn step was one I had come across and hadn't yet tried but MSI support was able to point me to the below link, which resolved this issue for me: https://www.msi.com/faq/faq-11370 .

OP, I hope this might help your situation as well.

One thing to note, is to make sure the boot64.exe file is saved to your flash drive in the EFI>Boot folder. Probably an obvious thing, but it didn't work for me originally because I had the boot64 file dropped directly into my USB drive, not within the EFI folder as downloaded.

Hey, thanks a ton --
that fix definitely works in the moment. However, I’m still having a weird recurring problem. My laptop often refuses to boot normally, so I have to flush the charge by holding the power button. Every time I do that, the 'Invalid signature' error pops back up. Any idea why my system keeps resetting or failing to boot in the first place?

 

[Tourica]

First, try reinstalling the BIOS update.
That should automatically reset Secure Boot
to its default settings.

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