[ubuntu] Update Problems

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http://ubuntuforums.org – 12.04.1 LTS Every 2 days or so, when I go to update my ubuntu, I get a Orange Triangle with a "!" something like this...http://drfishspawestville.co.za/Imag...orTriangle.GIF W:Failed to fetch http://ppa.launchpad.net/iaz/battery...source/Sources 404 Not Found , W:Failed to fetch http://ppa.launchpad.net/iaz/battery...amd64/Packages 404 Not Found , W:Failed to fetch http://ppa.launchpad.net/iaz/battery...-i386/Packages 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead. *Note* I have no cd drive with this netbook. It wa (Hardware)