While you cannot "download" the shader itself, you can ensure it works correctly by keeping your system and drivers updated:
The installation process was smoother than expected. Alex ensured that his GPU was compatible with Pixel Shader 3.0, a requirement that was easily met with his then-current graphics card. Upon installation, Alex was thrilled to find that his Windows 10 64-bit system now supported the advanced graphics features offered by Pixel Shader 3.0.
Many fake download sites offer:
: You can update your drivers through the Windows Device Manager or by using manufacturer-specific tools from companies like Intel Support .