2. Secure Boot
This page explains how to disable Secure Boot.
Disabling Secure Boot in BIOS
Boot and press [F2] to enter BIOS.
Go to [Security] tab > [Default Secure boot on] and set as [Disabled].
Go to [Save & Exit] tab > [Save Changes] and select [Yes].
Go to [Security] tab and enter [Delete All Secure Boot Variables] and select [Yes] to proceed.
Then, select [OK] to restart.
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