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‎06-08-2026 05:55 PM - edited ‎06-08-2026 05:55 PM

HP Recommended
Product: OMEN by HP Obelisk Desktop 875-0142
Operating System: Microsoft Windows 11

Hello, my PC out of nowhere started saying I have an invalid signature. I have tried bios update to no avail, it will work when I don't have secure boot active but nothing else seems to work. Any

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6 REPLIES 6

‎06-10-2026 09:49 AM

HP Recommended

Hi @WarriorWon1,

 

Welcome to the HP Support Community! We're stoked to have you on board! 

 

To help us get started on resolving your issue, could you please share the model name of your device?

 

Need help finding your product number? We've got you covered! Check out this handy guide:  

https://support.hp.com/in-en/document/ish_2039298-1862169-16 

 

Meanwhile, you can refer to the following link to resolve the issue: 

https://support.hp.com/us-en/document/ish_9642671-9641393-16

 

We're looking forward to helping you get back up and running! 

 

Best regards,

Kuroi_Kenshi

I'm an HP Employee.


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‎06-10-2026 10:05 AM

HP Recommended

Hello, I have the Omen Obelisk 875-0142. Product number is: 4NN82AA

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‎06-11-2026 03:16 PM

HP Recommended

Hi @WarriorWon1,

 

Thank you for the response.

 

Please refer to the below link and let me know if you need further assistance.

https://h30434.www3.hp.com/t5/Desktop-Knowledge-Base/Secure-Boot-Violation-Error-on-HP-Commercial-Pr...

 

Best Regards,

I'm an HP Employee.


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‎06-14-2026 06:30 AM

HP Recommended

I tried it and it still did nothing to help secure boot work. Still got a violation even after clearing CMOS

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‎06-16-2026 06:40 AM

HP Recommended

Hi @WarriorWon1,

 

Thanks for confirming the model details and for trying the earlier steps. Since Secure Boot is still failing even after clearing CMOS and restoring defaults, let’s go deeper with advanced recovery steps.
Disable TPM

Boot → press F10 → set TPM State to Disabled → Clear TPM: Yes → F10 to save → shut down → power on.

Enable Secure Boot

Boot → press F10 → apply Load HP Factory Default Keys → set Secure Boot to Enabled → F10 to save → shut down → power on.

Re‑enable TPM

Boot → press F10 → set TPM State to Enabled → Clear TPM: No → F10 to save → shut down → power on.

Verify in Windows

Run msinfo32 → check Secure Boot State: ON.

This sequence temporarily disables TPM, enrolls platform keys with Secure Boot, then re‑enables TPM. A restart is required between each step.

 

Let me know how it goes.

 

Best Regards,

I'm an HP Employee.


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‎06-23-2026 07:12 AM

HP Recommended

Thank you for this. I attempted it as soon as you emailed and it still didn't work

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