Update Manager Not working

Posted by Deena on Ask Ubuntu See other posts from Ask Ubuntu or by Deena
Published on 2011-11-25T23:25:22Z Indexed on 2011/11/26 2:07 UTC
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11.10

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update-manager

Hi When I try to press CHECK Button in Updated, it is not looking for updates available.

getting below error.

"Failed to Download repository information"

Check your Internet connection..

W:GPG error: http://archive.canonical.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]>
W:GPG error: http://archive.canonical.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]>
W:Failed to fetch gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_oneiric_main_source_Sources  Hash Sum mismatch
E:Some index files failed to download. They have been ignored, or old ones used instead.

Ubuntu Version 11.10

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