help how fix all these error

sudo apt-get update
Get:1 http://archive.canonical.com lucid Release.gpg [189B]
Ign http://archive.canonical.com/ubuntu/ lucid/partner Translation-en_US
Hit http://archive.canonical.com lucid Release
Err http://archive.canonical.com lucid Release

Ign http://ppa.launchpad.net lucid Release.gpg
Ign http://ppa.launchpad.net/user/ppa-name/ubuntu/ lucid/main Translation-en_US
Ign http://ppa.launchpad.net lucid Release
Ign http://ppa.launchpad.net lucid/main Packages
Ign http://ppa.launchpad.net lucid/main Packages
Err http://ppa.launchpad.net lucid/main Packages
  404 Not Found
Hit http://archive.ubuntu.com lucid Release.gpg
Ign http://archive.ubuntu.com/ubuntu/ lucid/main Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid/universe Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_US
Get:2 http://archive.ubuntu.com lucid-updates Release.gpg [189B]
Ign http://archive.ubuntu.com/ubuntu/ lucid-updates/main Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-updates/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-updates/universe Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-updates/multiverse Translation-en_US
Get:3 http://archive.ubuntu.com lucid-security Release.gpg [189B]
Ign http://archive.ubuntu.com/ubuntu/ lucid-security/main Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-security/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-security/universe Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-security/multiverse Translation-en_US
Get:4 http://archive.ubuntu.com lucid-proposed Release.gpg [189B]
Ign http://archive.ubuntu.com/ubuntu/ lucid-proposed/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-proposed/main Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-proposed/multiverse Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-proposed/universe Translation-en_US
Get:5 http://archive.ubuntu.com lucid-backports Release.gpg [189B]
Ign http://archive.ubuntu.com/ubuntu/ lucid-backports/restricted Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-backports/main Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-backports/multiverse Translation-en_US
Ign http://archive.ubuntu.com/ubuntu/ lucid-backports/universe Translation-en_US
Hit http://archive.ubuntu.com lucid Release
Get:6 http://archive.ubuntu.com lucid-updates Release [44.7kB]
Err http://archive.ubuntu.com lucid-updates Release

Get:7 http://archive.ubuntu.com lucid-security Release [38.5kB]
Err http://archive.ubuntu.com lucid-security Release

Get:8 http://archive.ubuntu.com lucid-proposed Release [38.5kB]
Ign http://archive.ubuntu.com lucid-proposed Release
Get:9 http://archive.ubuntu.com lucid-backports Release [32.5kB]
Hit http://archive.ubuntu.com lucid/main Packages
Hit http://archive.ubuntu.com lucid/restricted Packages
Hit http://archive.ubuntu.com lucid/main Sources
Hit http://archive.ubuntu.com lucid/restricted Sources
Hit http://archive.ubuntu.com lucid/universe Packages
Hit http://archive.ubuntu.com lucid/universe Sources
Hit http://archive.ubuntu.com lucid/multiverse Packages
Hit http://archive.ubuntu.com lucid/multiverse Sources
Get:10 http://archive.ubuntu.com lucid-proposed/restricted Packages [14B]
Get:11 http://archive.ubuntu.com lucid-proposed/main Packages [24.1kB]
Hit http://archive.ubuntu.com lucid-proposed/multiverse Packages
Get:12 http://archive.ubuntu.com lucid-proposed/universe Packages [20.6kB]
Hit http://archive.ubuntu.com lucid-backports/restricted Packages
Hit http://archive.ubuntu.com lucid-backports/main Packages
Hit http://archive.ubuntu.com lucid-backports/multiverse Packages
Get:13 http://archive.ubuntu.com lucid-backports/universe Packages [24.3kB]
Fetched 179kB in 38s (4,622B/s)
Reading package lists... Done
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://archive.canonical.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden>

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://archive.ubuntu.com lucid-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden>

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://archive.ubuntu.com lucid-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden>

W: GPG error: http://archive.ubuntu.com lucid-proposed Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden>
W: Failed to fetch http://archive.canonical.com/ubuntu/dists/lucid/Release

W: Failed to fetch http://ppa.launchpad.net/user/ppa-name/ubuntu/dists/lucid/main/binary-i386/Packages.gz 404 Not Found

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/lucid-updates/Release

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/lucid-security/Release

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