google-chrome causes failure in package upgrades

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http://askubuntu.com – I am using 11.10 64 bit and each time I reboot the machine I get to see an unusual pop up which says "An upgrade 12.04 is available" then it lists some of the packages installed on my system and asks if I want to upgrade to get rid of this annoying message I click on upgrade and after showing me it "seemingly" starts downloading some thing and at some arbit point it says update failed and asks me to check my internet connection. Here are my sources.list file # deb cdrom:[Ubuntu 11.10 _Oneiric Ocelot_ - Release amd64 (20111012)]/ dists/oneiric/main/binary-i386/ # deb cdrom:[Ubuntu 11.10 _On (HowTos)