Secure Boot Not Detected by Windows - Nitro AN515-41 (BIOS v1.18)

Aurx

Hi Acer Support,

I'm having trouble getting Secure Boot to work properly on my Nitro AN515-41 laptop. I’ve enabled Secure Boot in BIOS (version V1.18), and my system is booting in UEFI mode with a GPT disk. However, Windows still reports Secure Boot as “Off,” and I’m unable to play Valorant due to Vanguard’s anti-cheat requirements.

Here’s what I’ve tried:

• Enabled Secure Boot and set Supervisor Password
• Verified UEFI boot and GPT partition
• BIOS shows Secure Boot Mode as “Custom,” but it’s grayed out
• No option to install default Secure Boot keys or reset Secure Boot
• Tried power button reset and BIOS defaults

Could you advise how to install Secure Boot keys or unlock Secure Boot Mode? Is there a firmware update or workaround for this model?