topic Re:Secure Boot in Graphics

Secure Boot

TiagoRossi — Mon, 04 May 2026 18:19:20 GMT

Olá, estou com problema ao ativar o secure boot, quando está ativo esta dando erro: "Secure Boot Violation: Invalid Signature detected. Check secure boot policy in setup."

Eu não consigo usar o computador com o secure boot ativo, gostaria de saber como faço para arrumar esse erro. Vi que tem o UEFI CA 2023, mas para poder instalar no meu Computador preciso que o secure boot esteja ativado, e não consigo ativar ele.

Re:Secure Boot

Jobert_Intel — Tue, 05 May 2026 01:08:20 GMT

Hi TiagoRossi,

Por favor, seja informado de que usei uma ferramenta de tradução web para traduzir esta resposta; portanto, pode haver alguma tradução imprecisa.

Thank you for reaching out to the Intel Community Forum. To assist us in investigating the issue, please provide the following details:

Is your system currently booting in UEFI mode or Legacy/CSM mode, and was Windows installed with Secure Boot enabled or disabled?

In your BIOS setup, what Secure Boot mode is currently selected (Setup Mode, User Mode, or Custom Mode), and do you see any existing Secure Boot certificates in the key management section?

Does the "Invalid Signature detected" error occur immediately when you enable Secure Boot in BIOS, or only when trying to boot into Windows?

Have you made any recent hardware changes, BIOS updates, or installed any unsigned drivers/software that might affect boot security?

Have you tried using the "Clear Secure Boot Keys" or "Reset to Setup Mode" option in your BIOS to restore factory certificate settings?

Additionally, to gain a comprehensive understanding of your system, please use the System Support Utility (SSU). This tool will generate a text file compiling all your system information. You can follow the instructions at this link and send the text file here. Help Guide for the Intel® System Support Utility.

If you have any questions, please let us know. Thank you.

Best Regards,

Jobert T.

Intel Customer Support Technician

Re: Re:Secure Boot

TiagoRossi — Fri, 08 May 2026 20:34:26 GMT

Olá, está inicializando em UEFI. CSM está completamente desativado, não sei como foi instalado o Windows, mas ate ano passado estava funcionando.

Em modo standard, ou custom ele da o mesmo erro. Geralmente deixo no modo standar, mas ele não ativa o Secure Boot mesmo estando como ativado na BIOS.

o erro só ocorre quando tento inicializar o Windows

Não Instalei nada que possa afetar o Secure Boot

Ja usei a opção "Limpar chaves de inicialização segura" ou "Restaurar o modo de configuração", ele volta a funcionar mas com o Secure Boot desativado, mesmo estando como ativo na BIOS.

Re:Secure Boot

Jobert_Intel — Sat, 09 May 2026 00:43:50 GMT

Hi TiagoRossi,

Thank you for sharing the information I requested. I will now further investigate this and will get back to you once a resolution is available.

I appreciate your patience and understanding.

Best Regards,

Jobert T.

Intel Customer Support Technician

Re:Secure Boot

Jobert_Intel — Tue, 12 May 2026 01:17:18 GMT

Hi TiagoRossi,

Based on the issue described, further assistance will need to be provided by your motherboard manufacturer (OEM), as the behavior appears to be related to the motherboard platform, BIOS, or board-level implementation.

Please contact your motherboard manufacturer’s support team directly for additional troubleshooting, BIOS validation, compatibility checks, and any available firmware or configuration updates related to your system.

They will be in the best position to assist you further with this case.

Thank you for your understanding and continued support.

Best Regards,

Jobert T.

Intel Customer Support Technician