Зависимости пакетов нарушены? [Дубликат]

Я не могу установить VLC Media Player или даже обновить свой компьютер. Я получаю

Эта ошибка может быть вызвана отсутствующими необходимыми дополнительными программными пакетами или не устанавливается. Кроме того, может возникнуть конфликт между пакетами программного обеспечения, которые нельзя установить одновременно.

Затем я нажимаю "Дополнительно" Подробности и получение

Следующие пакеты имеют неудовлетворенные зависимости:

vlc: Depends: vlc-nox (= 2.0.8-0ubuntu0.13.04.1) but 2.0.8-0ubuntu0.13.04.1 is to be installed
Depends: libavcodec-extra-53 (>= 6:0.8.6) but it is not going to be installed
Depends: libavutil-extra-51 (>= 6:0.8.6) but it is not going to be installed
Depends: libc6 (>= 2.15) but 2.17-0ubuntu5 is to be installed
Depends: libfreetype6 (>= 2.2.1) but 2.4.11-0ubuntu1 is to be installed
Depends: libgcc1 (>= 1:4.1.1) but 1:4.7.3-1ubuntu1 is to be installed
Depends: libqtcore4 (>= 4:4.8.0) but 4:4.8.4+dfsg-0ubuntu9.3 is to be installed
Depends: libqtgui4 (>= 4:4.7.0~beta1) but 4:4.8.4+dfsg-0ubuntu9.3 is to be installed
Depends: libsdl-image1.2 (>= 1.2.10) but it is not going to be installed
Depends: libstdc++6 (>= 4.6) but 4.7.3-1ubuntu1 is to be installed
Depends: libtar0 but it is not going to be installed
Depends: libva-x11-1 (> 1.0.15~) but it is not going to be installed
Depends: libxcb-keysyms1 (>= 0.3.9) but it is not going to be installed
Depends: zlib1g (>= 1:1.2.3.3) but 1:1.2.7.dfsg-13ubuntu2 is to be installed

Как я могу это исправить? Спасибо.

Когда я обновляю систему с помощью Терминала, я получаю

Fetched 817 kB in 29s (27.7 kB/s)
N: Ignoring file 'duinsoft.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
W: GPG error: http://www.duinsoft.nl debs Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E18CE6625CB26B26
W: GPG error: http://us.archive.ubuntu.com raring Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: Failed to fetch http://ppa.launchpad.net/screenlets/...amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/screenlets/...-i386/Packages 404 Not Found

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

Список источников

# deb cdrom:[Ubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130424)]/ raring main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ raring main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ raring main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ raring-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ raring-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ raring universe
deb-src http://us.archive.ubuntu.com/ubuntu/ raring universe
deb http://us.archive.ubuntu.com/ubuntu/ raring-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ raring-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ raring multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ raring multiverse
deb http://us.archive.ubuntu.com/ubuntu/ raring-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ raring-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ raring-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ raring-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu raring-security main restricted
deb-src http://security.ubuntu.com/ubuntu raring-security main restricted
deb http://security.ubuntu.com/ubuntu raring-security universe
deb-src http://security.ubuntu.com/ubuntu raring-security universe
deb http://security.ubuntu.com/ubuntu raring-security multiverse
deb-src http://security.ubuntu.com/ubuntu raring-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu raring partner
# deb-src http://archive.canonical.com/ubuntu raring partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu raring main
deb-src http://extras.ubuntu.com/ubuntu raring main
deb http://ppa.launchpad.net/noobslab/noobslab-conky/ubuntu precise main
# deb-src http://ppa.launchpad.net/noobslab/noobslab-conky/ubuntu precise main

ПОСЛЕ СЛЕДУЮЩЕЙ ИНСТРУКЦИИ

W: GPG error: http://www.duinsoft.nl debs Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E18CE6625CB26B26
W: Failed to fetch http://ppa.launchpad.net/screenlets/ppa/ubuntu/dists/raring/main/binary-amd64/Packages  404  Not Found
W: Failed to fetch http://ppa.launchpad.net/screenlets/ppa/ubuntu/dists/raring/main/binary-i386/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
cyberproxy@Paradox:~$  sudo apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  efibootmgr grub-efi-amd64-bin kde-l10n-engb
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
N: Ignoring file 'duinsoft.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension