The guide describes the steps to enter the BIOS setup by pressing the DEL key during power‑on, navigate the boot order menu, and select the ATAPI CD‑ROM as the first boot device. After adjusting the order, the user saves the changes with the F10 key and exits the BIOS.
Following these instructions restores the default boot configuration if needed and ensures the system can boot from the CD‑ROM after a reinstall or BIOS reset. This manual is written in Japanese.