I don't want to run a dual boot system

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http://www.linuxquestions.org – I have a Toshiba computer with windows 8 on on it, but I want to delete or over write the windows with Linux. How would this be done I have been using Ubuntu in a Dual boot system, but I am unhappy with the dual boot system and with Ubuntu. What others distros are good for newbies on a laptop. (HowTos)