Formating Hard Drive in Laptop (Changing OS's)?

I want to format my hard drive before i put on a fresh operating system on there to make sure its of a good condition install.

But how can i format the old OS (Vista) of it and make the HDD clean.

Is there a way to do it in the BIOS?Formating Hard Drive in Laptop (Changing OS's)?
firstly... the Cd has a formatting option when you install the OS ... secondly if you stop the formatiing while its doing its job, you can harm your drive... so dont stop it... but I would put in a boot disc and make sure there is no bad sectors on the HDD before you do that... put the disc into the CD-ROM drive and let windows install to load, it should give you an option to enter a repair console by typing R after the modules are loaded.. when you are in the repair console type in chkdsk /f /r C:\ in a command line... and enter... that should tell you if you have bad sectors the reason you want to do that is to make sure your HDD is not going bad before you install your OS... it would be foolish to install and OS and find out that your drive is going bad... ahahhahaha... but all you need to really do is put the disc into the CD or DVD drive, and its easier than tying your shoelaces an idiot can do it :PFormating Hard Drive in Laptop (Changing OS's)?
when you boot to the cd erase it will ask what partition you want to install it on. chose to delete the partition then create a new partition.