I have windows xp Prof edition, i want to format my HD clean and restart, used to doing it with windows 98 boot up disk and just typing format c:/s but it doesnt work PLEASE HELP ...

I have windows XP Pro and when I first got it I just did the upgrade option on it. Now I wasnt to format and get rid of everthing and get a clean install and start over from scratch. I tried it on my ...