How do you reformat a computer?

[Severance]

bugrimmar said:

starcraft 2. it says that i need windows 7 *recommended*. i dont really understand it though. my graphics card is geforce 9800gt, but it only has shaders version 3.0. the list says i need shader version 4.0. how do i get that? do i even need to get windows 7? or is there a software upgrade for my graphics card?

lol you don't really need Windows 7 , it says recommended because its the newest and it doesn't crash like vista, i am using Linux and i managed to play the beta (Linux isn't even supported btw)