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I just purchased a Toshiba Laptop S855-068; I7-3630QM system with Windows 8. I would like to uninstall Windows 8 and install my licensed copy of Windows 7 Ultimate. I am going to be running CATIA (high end CAD software) which its not stable on Windows 8. I'm having trouble finding info and figuring out how to do this. Apparently its not as simple as I thought. Can someone help me please?