Shaders dont work on my computer. Is there a program or something I can get instead of getting a new graphics card?

no.

But you can use Fixed-function shaders (for example dot3 bumpmapping).
These shaders will be calculated from your CPU instead of the Grafixcard itself (If i know right)

Well you got it almost right.

FF shaders do use your graphics card, but they dont use the shader hardware. Almost all GPUs, new and most old ones, have the same basic fundamentals, and an FF shader uses these instead of the vertex/pixel shader hardware.

However the performance *may* drop when you use FF shaders, because its not using the hardware boosted shader modules. Vertex/Pixel shader hardware takes some strain off the GPU and will run faster.

You can always run with the D3D software REF driver ::))