It maybe that you need to go into Advanced BIOS settings to make sure that your CD drive is being recognised as the one to boot from.
Scroll all the way down to see all the possible boot devices and choose your cd device as the first drive.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
Apple predictions 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.