Secure boot violation

[353666]

Upon hooking up a new monitor we get the following on a red screen " Secure boot violation"

Invalid signature detected-Check secure boot policy in setup

[VikramTheGreat]

Hi @353666,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

The "Secure Boot Violation - Invalid signature detected. Check Secure Boot Policy in Setup" message usually indicates that Secure Boot is preventing a device, operating system component, or boot file from loading because it does not meet the current Secure Boot requirements.
 

To help us provide the correct guidance, could you please let us know:

• What is the exact HP desktop model or product number?
• Did this message start appearing immediately after connecting the new monitor, or were any other changes made around the same time?
• Have you recently changed any BIOS settings, such as Secure Boot, Legacy Support, UEFI settings, TPM settings, or boot order?
• Did you install any new hardware, graphics card, SSD, or operating system updates before this started?
• Are you able to enter the BIOS (F10), or does the error appear before you can access it?
   

Also, when the error appears:

• Does the computer continue booting if you press any key, or does it stop completely?
• What is the make and model of the new monitor?

Once we have the HP model and a bit more information about any recent BIOS or hardware changes, we can check the supported configuration and provide the appropriate next steps.

Take care and have an amazing day!

[VikramTheGreat]

Hi @353666,

I hope this message finds you well. I wanted to follow up on the technical issue we discussed earlier and confirm it has been resolved.
 

If you encounter any further issues or have any additional questions, please do not hesitate to reach out to us. We are here to assist you and provide any necessary support.
 

I will be archiving this case for now; however, you can respond to the same thread to continue the conversation.
 

Please click “Accepted Solution” if you feel my post solved your issue; it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

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Take care and have a great day ahead!

VikramTheGreat

HP Support