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[SOLVED] Cannot Install ANY programs; erroring out all over the place

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linux-howto

http://ubuntuforums.org – I just did a fresh install of 12.04 today because my old one was buggy, and the new install won't let me download ANY software, add any repositories, or update my system without erroring out. Here's what I get when I try to update: Code: W: GPG error: http://security.ubuntu.com precise-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]> W: GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing K (Hardware)