Ubuntu 12.04 updater не работающий

Это - ошибка, которую я продолжаю получать, когда я пытаюсь обновить что-либо.

Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal InRelease
Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal Release.gpg
Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal Release
Err cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/main amd64 Packages
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/restricted amd64 Packages
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/main i386 Packages
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/restricted i386 Packages
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/main Translation-en_US
Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/main Translation-en
Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/restricted Translation-en_US
Ign cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5) quantal/restricted Translation-en
Ign http://archive.ubuntu.com quantal InRelease                                
Get:1 http//repo.steampowered.com precise InRelease [2,840 B]                                    
Err http//archive.ubuntu.com quantal-updates/main Sources
  404  Not Found [IP: 91.189.91.13 80]
Err http://archive.ubuntu.com quantal-updates/restricted Sources

Ign http//archive.ubuntu.com quantal-security/main Translation-en_US

W: Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/main/binary-amd64/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs

W: Failed to fetch http:/archive.ubuntu.com/ubuntu/dists/quantal/main/source/Sources  404  Not Found [IP: 91.189.91.13 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

К вашему сведению: Я должен был стереть набор причины материала, она не позволит мне отправить все ссылки или безотносительно в отчете.