Want to reformat Toshiba Satellite Laptop

I want to reformat Toshiba Satellite Laptop. I don't have much info about laptop. I just want to reformat the hard drive. Can anyone help me ?

Thanks

I've seen a thousand people who thought they needed to reformat their drives, and have never seen a drive that needed reformatting yet. I have no idea why people think they need to do that, but it's like taking your car engine apart without having any idea how it goes back together.

Without much explanation I recommend you to reinstall your operating system using delivered recovery DVD. Put the recovery media into the DVD drive. Switch on the unit and press C button immediately after that and keep it down for a short time.