While starting the CDI, the following warning is displayed:
Pressing ENTER will continue the startup of the computer.
A DVD or CD is still in the DVD drive. Due to the UEFI-Bios the following warning is displayed:
The system found unauthorized changes on
the firmware, operating system or UEFI
Press [OK] to run the next boot device, or
enter directly to BIOS Setup if there are
no other boot devices installed.
Go to BIOS Setup > Advanced > Boot and
change the current boot device into other
secured boot devices.
In the BIOS, some settings need to be changed. Press DEL in the Boot screen to enter the BIOS: