Problem with updates

Thank you for reporting this bug to Ubuntu. Ubuntu Natty/11.04 reached EOL on 10/28/2012.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

I've converted this bug into a question so that you still may get some support on this issue.

Please follow the instructions in step 1 to 6 of https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure with the only exception that in step 6 you should not create a new question document, but should paste all output into this current one https://answers.launchpad.net/ubuntu/+source/synaptic/+question/224540

Gracias por su respuesta, pero yo no entiendo de ordenadores, yo no se como hacerlo.
¿si no actualizo los programas eso me dará problemas?

Gracias.

Thanks for your reply, but I do not understand computers, not as I do. If not I will update later problems?

This is what has come

victoria@victoria-H61H2-M2:~$ sudo grep -R proxy /etc/apt/*
[sudo] password for victoria:
victoria@victoria-H61H2-M2:~$ sudo grep -R proxy /etc/apt/*
victoria@victoria-H61H2-M2:~$ grep proxy /etc/environment
victoria@victoria-H61H2-M2:~$ echo $http_proxy

victoria@victoria-H61H2-M2:~$ echo $ftp_proxy

victoria@victoria-H61H2-M2:~$ grep proxy /etc/bash.bashrc
victoria@victoria-H61H2-M2:~$ cat /etc/apt/apt.conf
cat: /etc/apt/apt.conf: No existe el archivo o el directorio
victoria@victoria-H61H2-M2:~$ sudo fuser -vvv /var/lib/dpkg/lock
victoria@victoria-H61H2-M2:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"
victoria@victoria-H61H2-M2:~$ uname -a
Linux victoria-H61H2-M2 2.6.38-16-generic #67-Ubuntu SMP Thu Sep 6 17:58:38 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
victoria@victoria-H61H2-M2:~$ sudo rm /var/lib/apt/lists/lock
victoria@victoria-H61H2-M2:~$ sudo rm /var/lib/dpkg/lock
victoria@victoria-H61H2-M2:~$ sudo cp -arf /var/lib/dpkg /var/lib/dpkg.backup
victoria@victoria-H61H2-M2:~$ sudo mv /var/lib/dpkg/status /var/lib/dpkg/status-bad
victoria@victoria-H61H2-M2:~$ sudo cp /var/lib/dpkg/status-old /var/lib/dpkg/available-bad
victoria@victoria-H61H2-M2:~$ sudo cp /var/lib/dpkg/status-old /var/lib/dpkg/status || sudo cp /var/backups/apt.extended_states.0 /var/lib/dpkg/status
victoria@victoria-H61H2-M2:~$ sudo mv /var/lib/dpkg/available /var/lib/dpkg/available-bad
victoria@victoria-H61H2-M2:~$ sudo cp /var/lib/dpkg/available-old /var/lib/dpkg/available
victoria@victoria-H61H2-M2:~$ sudo rm -rf /var/lib/dpkg/updates/*
victoria@victoria-H61H2-M2:~$ sudo rm -rf /var/lib/apt/lists
victoria@victoria-H61H2-M2:~$ sudo rm /var/cache/apt/*.bin
victoria@victoria-H61H2-M2:~$ sudo mkdir /var/lib/apt/lists
victoria@victoria-H61H2-M2:~$ sudo mkdir /var/lib/apt/lists/partial
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get clean
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get autoclean
Reading package lists... Done
Building dependency tree
Reading state information... Done
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get --purge autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
8 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up gimp-data-extras (1:2.0.1-3) ...
Setting up gimp-gmic (1.4.8.1+dfsg-2) ...
Setting up libgutenprintui2-1 (5.2.6-1ubuntu1) ...
Setting up gimp-gutenprint (5.2.6-1ubuntu1) ...
Setting up libtiff-tools (3.9.4-5ubuntu6.3) ...
Setting up gimp-plugin-registry (3.5.1-1) ...
Setting up gutenprint-locales (5.2.6-1ubuntu1) ...
Setting up xcftools (1.0.7-2ubuntu1) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get --fix-missing update -o APT::Cache-Limit=100000000
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise InRelease
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise Release.gpg
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise Release
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/main TranslationIndex
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/restricted TranslationIndex
Err cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/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 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/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
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/main Translation-en
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/restricted Translation-en
Ign http://ubuntu.cica.es natty InRelease
Ign http://ubuntu.cica.es natty-updates InRelease
Ign http://dl.google.com stable InRelease
Get:1 http://dl.google.com stable Release.gpg [198 B]
Ign http://ubuntu.cica.es natty-security InRelease
Get:2 http://dl.google.com stable Release [1347 B]
Ign http://ubuntu.cica.es natty-proposed InRelease
Get:3 http://ubuntu.cica.es natty Release.gpg [198 B]
Get:4 http://ubuntu.cica.es natty-updates Release.gpg [198 B]
Get:5 http://ubuntu.cica.es natty-security Release.gpg [198 B]
Get:6 http://ubuntu.cica.es natty-proposed Release.gpg [198 B]
Get:7 http://ubuntu.cica.es natty Release [39.8 kB]
Get:8 http://dl.google.com stable/main amd64 Packages [1242 B]
Get:9 http://ubuntu.cica.es natty-updates Release [39.8 kB]
Ign http://dl.google.com stable/main TranslationIndex
Get:10 http://ubuntu.cica.es natty-security Release [39.8 kB]
Get:11 http://ubuntu.cica.es natty-proposed Release [39.8 kB]
Ign http://dl.google.com stable/main Translation-en
Get:12 http://ubuntu.cica.es natty/main Sources [862 kB]
Ign http://ppa.launchpad.net natty InRelease
Ign http://archive.canonical.com natty InRelease
Get:13 http://ppa.launchpad.net natty Release.gpg [316 B]
Get:14 http://archive.canonical.com natty Release.gpg [198 B]
Get:15 http://ppa.launchpad.net natty Release [9740 B]
Get:16 http://archive.canonical.com natty Release [5916 B]
Get:17 http://archive.canonical.com natty/partner Sources [4080 B]
Get:18 http://archive.canonical.com natty/partner amd64 Packages [6634 B]
Ign http://archive.canonical.com natty/partner TranslationIndex
Ign http://archive.canonical.com natty/partner Translation-en
Get:19 http://ppa.launchpad.net natty/main Sources [2158 B]
Get:20 http://ppa.launchpad.net natty/main amd64 Packages [4285 B]
Ign http://ppa.launchpad.net natty/main TranslationIndex
Ign http://ppa.launchpad.net natty/main Translation-en
Get:21 http://ubuntu.cica.es natty/restricted Sources [4104 B]
Get:22 http://ubuntu.cica.es natty/universe Sources [4380 kB]
Get:23 http://ubuntu.cica.es natty/multiverse Sources [155 kB]
Get:24 http://ubuntu.cica.es natty/main amd64 Packages [1550 kB]
Get:25 http://ubuntu.cica.es natty/restricted amd64 Packages [9001 B]
Get:26 http://ubuntu.cica.es natty/universe amd64 Packages [6004 kB]
Get:27 http://ubuntu.cica.es natty/multiverse amd64 Packages [181 kB]
Ign http://ubuntu.cica.es natty/main TranslationIndex
Ign http://ubuntu.cica.es natty/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty/restricted TranslationIndex
Ign http://ubuntu.cica.es natty/universe TranslationIndex
Get:28 http://ubuntu.cica.es natty-updates/main Sources [174 kB]
Get:29 http://ubuntu.cica.es natty-updates/restricted Sources [2116 B]
Get:30 http://ubuntu.cica.es natty-updates/universe Sources [52.8 kB]
Get:31 http://ubuntu.cica.es natty-updates/multiverse Sources [3113 B]
Get:32 http://ubuntu.cica.es natty-updates/main amd64 Packages [502 kB]
Get:33 http://ubuntu.cica.es natty-updates/restricted amd64 Packages [6240 B]
Get:34 http://ubuntu.cica.es natty-updates/universe amd64 Packages [165 kB]
Get:35 http://ubuntu.cica.es natty-updates/multiverse amd64 Packages [6361 B]
Ign http://ubuntu.cica.es natty-updates/main TranslationIndex
Ign http://ubuntu.cica.es natty-updates/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty-updates/restricted TranslationIndex
Ign http://ubuntu.cica.es natty-updates/universe TranslationIndex
Get:36 http://ubuntu.cica.es natty-security/main Sources [112 kB]
Get:37 http://ubuntu.cica.es natty-security/restricted Sources [1303 B]
Get:38 http://ubuntu.cica.es natty-security/universe Sources [31.2 kB]
Get:39 http://ubuntu.cica.es natty-security/multiverse Sources [1667 B]
Get:40 http://ubuntu.cica.es natty-security/main amd64 Packages [371 kB]
Get:41 http://ubuntu.cica.es natty-security/restricted amd64 Packages [4778 B]
Get:42 http://ubuntu.cica.es natty-security/universe amd64 Packages [104 kB]
Get:43 http://ubuntu.cica.es natty-security/multiverse amd64 Packages [3539 B]
Ign http://ubuntu.cica.es natty-security/main TranslationIndex
Ign http://ubuntu.cica.es natty-security/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty-security/restricted TranslationIndex
Ign http://ubuntu.cica.es natty-security/universe TranslationIndex
Get:44 http://ubuntu.cica.es natty-proposed/restricted amd64 Packages [14 B]
Get:45 http://ubuntu.cica.es natty-proposed/main amd64 Packages [110 kB]
Get:46 http://ubuntu.cica.es natty-proposed/multiverse amd64 Packages [1300 B]
Get:47 http://ubuntu.cica.es natty-proposed/universe amd64 Packages [27.1 kB]
Ign http://ubuntu.cica.es natty-proposed/main TranslationIndex
Ign http://ubuntu.cica.es natty-proposed/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty-proposed/restricted TranslationIndex
Ign http://ubuntu.cica.es natty-proposed/universe TranslationIndex
Ign http://ubuntu.cica.es natty/main Translation-en
Ign http://ubuntu.cica.es natty/multiverse Translation-en
Ign http://ubuntu.cica.es natty/restricted Translation-en
Ign http://ubuntu.cica.es natty/universe Translation-en
Ign http://ubuntu.cica.es natty-updates/main Translation-en
Ign http://ubuntu.cica.es natty-updates/multiverse Translation-en
Ign http://ubuntu.cica.es natty-updates/restricted Translation-en
Ign http://ubuntu.cica.es natty-updates/universe Translation-en
Ign http://ubuntu.cica.es natty-security/main Translation-en
Ign http://ubuntu.cica.es natty-security/multiverse Translation-en
Ign http://ubuntu.cica.es natty-security/restricted Translation-en
Ign http://ubuntu.cica.es natty-security/universe Translation-en
Ign http://ubuntu.cica.es natty-proposed/main Translation-en
Ign http://ubuntu.cica.es natty-proposed/multiverse Translation-en
Ign http://ubuntu.cica.es natty-proposed/restricted Translation-en
Ign http://ubuntu.cica.es natty-proposed/universe Translation-en
Fetched 15.0 MB in 2min 30s (99.5 kB/s)
W: Failed to fetch cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/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 cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/restricted/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

E: Some index files failed to download. They have been ignored, or old ones used instead.
victoria@victoria-H61H2-M2:~$ sudo dpkg --configure -a
victoria@victoria-H61H2-M2:~$ sudo dpkg --clear-avail
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 12 not upgraded.
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get --fix-missing install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 12 not upgraded.
victoria@victoria-H61H2-M2:~$ LANG=C;sudo apt-get update -o APT::Cache-Limit=100000000 && sudo apt-get dist-upgrade
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise InRelease
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise Release.gpg
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise Release
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/main TranslationIndex
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/restricted TranslationIndex
Err cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/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 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/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
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/main Translation-en
Ign cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425) precise/restricted Translation-en
Ign http://ubuntu.cica.es natty InRelease
Ign http://ubuntu.cica.es natty-updates InRelease
Ign http://ppa.launchpad.net natty InRelease
Ign http://ubuntu.cica.es natty-security InRelease
Hit http://ppa.launchpad.net natty Release.gpg
Ign http://dl.google.com stable InRelease
Hit http://ppa.launchpad.net natty Release
Ign http://ubuntu.cica.es natty-proposed InRelease
Hit http://ubuntu.cica.es natty Release.gpg
Hit http://ubuntu.cica.es natty-updates Release.gpg
Hit http://ubuntu.cica.es natty-security Release.gpg
Hit http://dl.google.com stable Release.gpg
Hit http://ppa.launchpad.net natty/main Sources
Hit http://ubuntu.cica.es natty-proposed Release.gpg
Hit http://ubuntu.cica.es natty Release
Hit http://ppa.launchpad.net natty/main amd64 Packages
Ign http://ppa.launchpad.net natty/main TranslationIndex
Hit http://ubuntu.cica.es natty-updates Release
Hit http://dl.google.com stable Release
Hit http://ubuntu.cica.es natty-security Release
Hit http://ubuntu.cica.es natty-proposed Release
Hit http://ubuntu.cica.es natty/main Sources
Hit http://ubuntu.cica.es natty/restricted Sources
Hit http://ubuntu.cica.es natty/universe Sources
Hit http://ubuntu.cica.es natty/multiverse Sources
Hit http://ubuntu.cica.es natty/main amd64 Packages
Hit http://ubuntu.cica.es natty/restricted amd64 Packages
Hit http://ubuntu.cica.es natty/universe amd64 Packages
Hit http://ubuntu.cica.es natty/multiverse amd64 Packages
Ign http://ubuntu.cica.es natty/main TranslationIndex
Ign http://ubuntu.cica.es natty/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty/restricted TranslationIndex
Ign http://ubuntu.cica.es natty/universe TranslationIndex
Ign http://ppa.launchpad.net natty/main Translation-en
Hit http://ubuntu.cica.es natty-updates/main Sources
Hit http://ubuntu.cica.es natty-updates/restricted Sources
Hit http://ubuntu.cica.es natty-updates/universe Sources
Hit http://ubuntu.cica.es natty-updates/multiverse Sources
Hit http://ubuntu.cica.es natty-updates/main amd64 Packages
Hit http://ubuntu.cica.es natty-updates/restricted amd64 Packages
Hit http://ubuntu.cica.es natty-updates/universe amd64 Packages
Hit http://ubuntu.cica.es natty-updates/multiverse amd64 Packages
Ign http://ubuntu.cica.es natty-updates/main TranslationIndex
Ign http://ubuntu.cica.es natty-updates/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty-updates/restricted TranslationIndex
Ign http://ubuntu.cica.es natty-updates/universe TranslationIndex
Hit http://ubuntu.cica.es natty-security/main Sources
Hit http://ubuntu.cica.es natty-security/restricted Sources
Hit http://ubuntu.cica.es natty-security/universe Sources
Hit http://ubuntu.cica.es natty-security/multiverse Sources
Hit http://ubuntu.cica.es natty-security/main amd64 Packages
Hit http://dl.google.com stable/main amd64 Packages
Hit http://ubuntu.cica.es natty-security/restricted amd64 Packages
Ign http://dl.google.com stable/main TranslationIndex
Hit http://ubuntu.cica.es natty-security/universe amd64 Packages
Hit http://ubuntu.cica.es natty-security/multiverse amd64 Packages
Ign http://ubuntu.cica.es natty-security/main TranslationIndex
Ign http://ubuntu.cica.es natty-security/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty-security/restricted TranslationIndex
Ign http://dl.google.com stable/main Translation-en
Ign http://ubuntu.cica.es natty-security/universe TranslationIndex
Hit http://ubuntu.cica.es natty-proposed/restricted amd64 Packages
Hit http://ubuntu.cica.es natty-proposed/main amd64 Packages
Hit http://ubuntu.cica.es natty-proposed/multiverse amd64 Packages
Hit http://ubuntu.cica.es natty-proposed/universe amd64 Packages
Ign http://ubuntu.cica.es natty-proposed/main TranslationIndex
Ign http://ubuntu.cica.es natty-proposed/multiverse TranslationIndex
Ign http://ubuntu.cica.es natty-proposed/restricted TranslationIndex
Ign http://ubuntu.cica.es natty-proposed/universe TranslationIndex
Ign http://ubuntu.cica.es natty/main Translation-en
Ign http://ubuntu.cica.es natty/multiverse Translation-en
Ign http://ubuntu.cica.es natty/restricted Translation-en
Ign http://ubuntu.cica.es natty/universe Translation-en
Ign http://ubuntu.cica.es natty-updates/main Translation-en
Ign http://ubuntu.cica.es natty-updates/multiverse Translation-en
Ign http://ubuntu.cica.es natty-updates/restricted Translation-en
Ign http://ubuntu.cica.es natty-updates/universe Translation-en
Ign http://ubuntu.cica.es natty-security/main Translation-en
Ign http://ubuntu.cica.es natty-security/multiverse Translation-en
Ign http://ubuntu.cica.es natty-security/restricted Translation-en
Ign http://ubuntu.cica.es natty-security/universe Translation-en
Ign http://ubuntu.cica.es natty-proposed/main Translation-en
Ign http://ubuntu.cica.es natty-proposed/multiverse Translation-en
Ign http://ubuntu.cica.es natty-proposed/restricted Translation-en
Ign http://ubuntu.cica.es natty-proposed/universe Translation-en
Ign http://archive.canonical.com natty InRelease
Hit http://archive.canonical.com natty Release.gpg
Hit http://archive.canonical.com natty Release
Hit http://archive.canonical.com natty/partner Sources
Hit http://archive.canonical.com natty/partner amd64 Packages
Ign http://archive.canonical.com natty/partner TranslationIndex
Ign http://archive.canonical.com natty/partner Translation-en
W: Failed to fetch cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/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 cdrom://Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)/dists/precise/restricted/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

E: Some index files failed to download. They have been ignored, or old ones used instead.
victoria@victoria-H61H2-M2:~$ find /etc/apt -name '*.list' -exec bash -c 'echo -e "\n$1\n"; cat -n "$1"' _ '{}' \;

/etc/apt/sources.list.d/lars-opdenkamp-xbmc-pvr-natty.list

     1 deb http://ppa.launchpad.net/lars-opdenkamp/xbmc-pvr/ubuntu natty main
     2 deb-src http://ppa.launchpad.net/lars-opdenkamp/xbmc-pvr/ubuntu natty main

/etc/apt/sources.list.d/google-chrome.list

     1 ### THIS FILE IS AUTOMATICALLY CONFIGURED ###
     2 # You may comment out this entry, but any other modifications may be lost.
     3 deb http://dl.google.com/linux/chrome/deb/ stable main

/etc/apt/sources.list

     1 #
     2
     3 # deb cdrom:[Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110426)]/ natty main restricted
     4
     5 # deb cdrom:[Ubuntu 11.04 _Natty Narwhal_ - Release amd64 (20110426)]/ natty main restricted
     6
     7 # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
     8 # newer versions of the distribution.
     9 deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ precise main restricted
    10 deb http://ubuntu.cica.es/ubuntu/ natty main restricted
    11 deb-src http://ubuntu.cica.es/ubuntu/ natty main restricted
    12
    13 ## Major bug fix updates produced after the final release of the
    14 ## distribution.
    15 deb http://ubuntu.cica.es/ubuntu/ natty-updates main restricted
    16 deb-src http://ubuntu.cica.es/ubuntu/ natty-updates main restricted
    17
    18 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
    19 ## team. Also, please note that software in universe WILL NOT receive any
    20 ## review or updates from the Ubuntu security team.
    21 deb http://ubuntu.cica.es/ubuntu/ natty universe
    22 deb-src http://ubuntu.cica.es/ubuntu/ natty universe
    23 deb http://ubuntu.cica.es/ubuntu/ natty-updates universe
    24 deb-src http://ubuntu.cica.es/ubuntu/ natty-updates universe
    25
    26 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
    27 ## team, and may not be under a free licence. Please satisfy yourself as to
    28 ## your rights to use the software. Also, please note that software in
    29 ## multiverse WILL NOT receive any review or updates from the Ubuntu
    30 ## security team.
    31 deb http://ubuntu.cica.es/ubuntu/ natty multiverse
    32 deb-src http://ubuntu.cica.es/ubuntu/ natty multiverse
    33 deb http://ubuntu.cica.es/ubuntu/ natty-updates multiverse
    34 deb-src http://ubuntu.cica.es/ubuntu/ natty-updates multiverse
    35
    36 ## Uncomment the following two lines to add software from the 'backports'
    37 ## repository.
    38 ## N.B. software from this repository may not have been tested as
    39 ## extensively as that contained in the main release, although it includes
    40 ## newer versions of some applications which may provide useful features.
    41 ## Also, please note that software in backports WILL NOT receive any review
    42 ## or updates from the Ubuntu security team.
    43 # deb http://es.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse
    44 # deb-src http://es.archive.ubuntu.com/ubuntu/ natty-backports main restricted universe multiverse
    45
    46 deb http://ubuntu.cica.es/ubuntu/ natty-security main restricted
    47 deb-src http://ubuntu.cica.es/ubuntu/ natty-security main restricted
    48 deb http://ubuntu.cica.es/ubuntu/ natty-security universe
    49 deb-src http://ubuntu.cica.es/ubuntu/ natty-security universe
    50 deb http://ubuntu.cica.es/ubuntu/ natty-security multiverse
    51 deb-src http://ubuntu.cica.es/ubuntu/ natty-security multiverse
    52
    53 ## Uncomment the following two lines to add software from Canonical's
    54 ## 'partner' repository.
    55 ## This software is not part of Ubuntu, but is offered by Canonical and the
    56 ## respective vendors as a service to Ubuntu users.
    57 deb http://archive.canonical.com/ubuntu natty partner
    58 deb-src http://archive.canonical.com/ubuntu natty partner
    59
    60 ## This software is not part of Ubuntu, but is offered by third-party
    61 ## developers who want to ship their latest software.
    62 # deb http://extras.ubuntu.com/ubuntu natty main
    63 deb http://ubuntu.cica.es/ubuntu/ natty-proposed restricted main multiverse universe
    64 # deb-src http://extras.ubuntu.com/ubuntu natty main
    65
victoria@victoria-H61H2-M2:~$

Thanks, I think the problem is resolved.

There is one thing that you should still do:
Open a terminal (e.g by pressing ctrl-alt-t) and issue the command

gksudo gedit /etc/apt/sources.list

This will ask for your password and open an editor with your sources.list.
In line 9 you have to put a '#' character at the beginning of the line

change
deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin...
to
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin...

save the file and close the editor.
Then try doing updates again.

I thought it was solved hehe. I finished the last step I said, now try to download updates. I hope I get it right.
Thank you very much.