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Rev

Thanks. I checked all the BIOS setting, there is only one place to set boot to UEFI only, Legacy only, or both. Even I set UEFI only and save & restart, the BIOS setting will change back to Legacy only again. It looks like, disabled Secure Boot is protecting some BIOS setting from being changed.
– microbit
Commented May 5, 2017 at 2:25
1

Secure Boot is UEFI - This is absolutely false Secure Boot is NOT UEFI it's simply a feature of UEFI. You can disable Secure Boot on ALL Windows 8, Windows 8.1, and Windows 10 OEM machines. Being able to disable Secure Boot is required for an OEM to sell the device
– Ramhound
Commented May 5, 2017 at 2:41

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