vertex shaders cannot be downloaded. they come with the graphics card and cannot be upgraded without buying a new graphics card
You need to get a more modern graphics/video card.
You cannot download any type of vertex shader version. It is built in your Mother Board of your computer.
there is no site to download vertex shader 4.0, it is buit in on mOtherborad
You don't download it. This refers to functionality of your graphics card and most graphics cards today should support this shader model. If you have a recent graphics card and it claims to not...