Question : How to format my computer

I'm trying to format my C drive. I have tried in windows from start-my computer-c-format but it says I have to close othe applications and I have tried via MSdos prompt but this still does not allow me to format. Please can you suggest the easiest way to format and the process required.

Thanks All

Answer : How to format my computer

pop the os install cd in the computer and boot to it and let it walk you threw
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