If you were not able to find the CD/DVD-ROM drive from the boot menu, go to the BIOS setup and enable USB Legacy Support in the BIOS menus:
- On the startup screen, press Delete.
- On the BIOS setup, go to Advanced menu.
- Go to USB Legacy Support and change it to Enable.
- Go to Save & Exit and select Yes from the prompt.
- When the controller restarts, press F10 to open the boot menu.
- Verify that you can see the CD/DVD-ROM drive.