I tried sudo apt-get update and got this:
Ign
http://dl.google.com stable InRelease
Ign
http://security.ubuntu.com quantal-security InRelease
Hit
http://dl.google.com stable Release.gpg
Hit
http://security.ubuntu.com quantal-security Release.gpg
Hit
http://dl.google.com stable Release
Hit
http://security.ubuntu.com quantal-security Release
Ign
http://archive.ubuntu.com quantal InRelease
Ign
http://packages.linuxmint.com nadia InRelease
Ign
http://archive.canonical.com quantal InRelease
Ign
http://archive.ubuntu.com quantal-updates InRelease
Get:1
http://packages.linuxmint.com nadia Release.gpg [198 B]
Hit
http://archive.canonical.com quantal Release.gpg
Ign
http://ppa.launchpad.net quantal InRelease
Get:2
http://packages.linuxmint.com nadia Release [18.6 kB]
Hit
http://archive.ubuntu.com quantal Release.gpg
Hit
http://dl.google.com stable/main i386 Packages
Hit
http://security.ubuntu.com quantal-security/main i386 Packages
Hit
http://archive.canonical.com quantal Release
Ign
http://ppa.launchpad.net quantal InRelease
Hit
http://security.ubuntu.com quantal-security/restricted i386 Packages
Hit
http://security.ubuntu.com quantal-security/universe i386 Packages
Hit
http://archive.ubuntu.com quantal-updates Release.gpg
Hit
http://security.ubuntu.com quantal-security/multiverse i386 Packages
Ign
http://ppa.launchpad.net quantal InRelease
Get:3
http://packages.linuxmint.com nadia/main i386 Packages [22.3 kB]
Hit
http://archive.canonical.com quantal/partner i386 Packages
Hit
http://archive.ubuntu.com quantal Release
Hit
http://security.ubuntu.com quantal-security/main Translation-en
Hit
http://ppa.launchpad.net quantal Release.gpg
Hit
http://security.ubuntu.com quantal-security/multiverse Translation-en
Hit
http://archive.ubuntu.com quantal-updates Release
Get:4
http://packages.linuxmint.com nadia/upstream i386 Packages [11.3 kB]
Ign
http://ppa.launchpad.net quantal Release.gpg
Hit
http://security.ubuntu.com quantal-security/restricted Translation-en
Hit
http://archive.ubuntu.com quantal/main i386 Packages
Ign
http://dl.google.com stable/main Translation-en_CA
Get:5
http://packages.linuxmint.com nadia/import i386 Packages [44.3 kB]
Hit
http://security.ubuntu.com quantal-security/universe Translation-en
Hit
http://ppa.launchpad.net quantal Release.gpg
Ign
http://dl.google.com stable/main Translation-en
Hit
http://archive.ubuntu.com quantal/restricted i386 Packages
Hit
http://ppa.launchpad.net quantal Release
Hit
http://archive.ubuntu.com quantal/universe i386 Packages
Ign
http://ppa.launchpad.net quantal Release
Hit
http://archive.ubuntu.com quantal/multiverse i386 Packages
Hit
http://ppa.launchpad.net quantal Release
Hit
http://archive.ubuntu.com quantal/main Translation-en_CA
Hit
http://ppa.launchpad.net quantal/main Sources
Hit
http://archive.ubuntu.com quantal/main Translation-en
Hit
http://ppa.launchpad.net quantal/main i386 Packages
Ign
http://security.ubuntu.com quantal-security/main Translation-en_CA
Ign
http://security.ubuntu.com quantal-security/multiverse Translation-en_CA
Ign
http://security.ubuntu.com quantal-security/restricted Translation-en_CA
Ign
http://archive.canonical.com quantal/partner Translation-en_CA
Ign
http://security.ubuntu.com quantal-security/universe Translation-en_CA
Hit
http://archive.ubuntu.com quantal/multiverse Translation-en
Ign
http://archive.canonical.com quantal/partner Translation-en
Hit
http://archive.ubuntu.com quantal/restricted Translation-en
Hit
http://archive.ubuntu.com quantal/universe Translation-en_CA
Hit
http://archive.ubuntu.com quantal/universe Translation-en
Hit
http://archive.ubuntu.com quantal-updates/main i386 Packages
Hit
http://ppa.launchpad.net quantal/main Sources
Hit
http://archive.ubuntu.com quantal-updates/restricted i386 Packages
Hit
http://ppa.launchpad.net quantal/main i386 Packages
Hit
http://archive.ubuntu.com quantal-updates/universe i386 Packages
Hit
http://archive.ubuntu.com quantal-updates/multiverse i386 Packages
Hit
http://archive.ubuntu.com quantal-updates/main Translation-en
Hit
http://archive.ubuntu.com quantal-updates/multiverse Translation-en
Hit
http://archive.ubuntu.com quantal-updates/restricted Translation-en
Ign
http://packages.linuxmint.com nadia/import Translation-en_CA
Ign
http://packages.linuxmint.com nadia/import Translation-en
Hit
http://archive.ubuntu.com quantal-updates/universe Translation-en
Ign
http://packages.linuxmint.com nadia/main Translation-en_CA
Ign
http://packages.linuxmint.com nadia/main Translation-en
Ign
http://packages.linuxmint.com nadia/upstream Translation-en_CA
Ign
http://packages.linuxmint.com nadia/upstream Translation-en
Ign
http://ppa.launchpad.net quantal/main Translation-en_CA
Ign
http://ppa.launchpad.net quantal/main Translation-en
Ign
http://archive.ubuntu.com quantal/multiverse Translation-en_CA
Err
http://ppa.launchpad.net quantal/main Sources
404 Not Found
Ign
http://archive.ubuntu.com quantal/restricted Translation-en_CA
Err
http://ppa.launchpad.net quantal/main i386 Packages
404 Not Found
Ign
http://archive.ubuntu.com quantal-updates/main Translation-en_CA
Ign
http://ppa.launchpad.net quantal/main Translation-en_CA
Ign
http://archive.ubuntu.com quantal-updates/multiverse Translation-en_CA
Ign
http://ppa.launchpad.net quantal/main Translation-en
Ign
http://archive.ubuntu.com quantal-updates/restricted Translation-en_CA
Ign
http://ppa.launchpad.net quantal/main Translation-en_CA
Ign
http://archive.ubuntu.com quantal-updates/universe Translation-en_CA
Ign
http://ppa.launchpad.net quantal/main Translation-en
Fetched 96.7 kB in 5s (17.0 kB/s)
W: Failed to fetch
http://ppa.launchpad.net/gwibber-daily/ ... ce/Sources 404 Not Found
W: Failed to fetch
http://ppa.launchpad.net/gwibber-daily/ ... 6/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
And then i tried to install the programs with sudo apt-get -f install, but got the same errors. also I'm on a wired connection now.