[ubuntu] Problem with the system settings in Ubuntu 12.04

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http://ubuntuforums.org – Hi, I am new user of Ubuntu OS. I had installed Ubuntu 12.04. Unfortunately 'System Settings' option got disappeared. If I click on the 'System Settings' at the right corner (above) of the desktop, it does not open. That's why I installed 'system settings' from the ubuntu software center. But it's KDE based. Also the screen shot is completely different from the default 'system settings'. I want to get back the default system settings option. Pls help me. (Hardware)