Ubuntu 12.10 overheats and fan runs high

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http://askubuntu.com – I have the problem with my fan constantly and hot CPU. I have a Dell Inspirion 15r special edition. I followed the instructions to load Jupiter to solve this but when I enter: sudo add-apt-repository ppa:webup8team/jupiter I get the following error: Cannot access PPA (https://launchpad.net/API/1.0/~webup8team/+archive/Jupiter) to get PPA information, please check your Internet connection Internet is working Appreciate any inputs Tha (HowTos)