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

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

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

W: Failed to fetch http://sy.archive.ubuntu.com/ubuntu/dists/karmic-backports/Release

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/main/source/Sources.bz2  Hash Sum mismatch

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

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

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