How do I install linux and get rid of windows xp?

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http://i486.net – I just received a computer from a friend who has a corrupted version of Windows XP. I tried to uninstall the application command but it says it wont work. I tried to install Linux, but after the splash screen it comes up with all these error messages. Im not planning on partitioning my hard drives. Does anyone know if you need to uninstall Windows from Linux labor law? (General)