Ошибка при установке обновления Lubuntu 12.04

[Andron1818]

W:Failed to fetch cdrom://Lubuntu 12.04 _Precise Pangolin_ - Release i386 (20120423)/dists/precise/main/binary-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
, W:Failed to fetch cdrom://Lubuntu 12.04 _Precise Pangolin_ - Release i386 (20120423)/dists/precise/multiverse/binary-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
, W:Failed to fetch cdrom://Lubuntu 12.04 _Precise Pangolin_ - Release i386 (20120423)/dists/precise/restricted/binary-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
, W:Failed to fetch cdrom://Lubuntu 12.04 _Precise Pangolin_ - Release i386 (20120423)/dists/precise/universe/binary-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
, W:Failed to fetch http://ppa.launchpad.net/am-monkeyd/nautilus-elementary-ppa/ubuntu/dists/precise/main/source/Sources  404  Not Found
, W:Failed to fetch http://ppa.launchpad.net/am-monkeyd/nautilus-elementary-ppa/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found
, W:Failed to fetch http://ppa.launchpad.net/zveroy/aegisub/ubuntu/dists/precise/main/source/Sources  404  Not Found
, W:Failed to fetch http://ppa.launchpad.net/zveroy/aegisub/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.

помогите пожалуйста решить проблему.