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Thunderbolt BIOS Settings not passing through for "Legacy"


I have a NUC7i7BNH, and would like to prevent the approval being required when new devices are plugged in via Thunderbolt 3. There is a service running on the machine that simply looks for new connections - the service is running while no one is logged in.

Operating System: Windows 10

In the BIOS, I have set:

Security -> Security Features -> Thunderbolt Security Level -> Legacy Mode

However, in Windows, we receive the prompt that the device needs to be approved, and when you go to "About", the Thunderbolt Controller "Security Level" is "User Authorization (SL1)"

All items are on their latest versions (Drivers, BIOS, etc).

Is there a step missing?

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Community Manager

Hello hbompesupport,

Thank you for posting.

I have sent you a private message, please check your inbox.

Amy C

Intel Customer Support Technician

Under Contract to Intel Corporation