If you need to disable Secure Boot, use the Console in the panel to access your server and initiate a reboot. When the boot screen appears as shown below, press the Esc key to enter the BIOS:

The UEFI setting screen will be like this:

Enter Device Manager, then enter Secure Boot Configuration:

Use arrow keys to move to Attempt Secure Boot option and press Space key to deselect Secure Boot:

Back to the main UEFI settings screen and choose Reset to reboot the VM.
