Pixel Shader instructions are handled by your GPU driver. Even on Windows 10, an outdated driver can cause "Shader Not Found" errors. GeForce Experience or their website. Radeon Software Intel Driver & Support Assistant 2. Install DirectX End-User Runtimes
, you definitely have Shader 5.0 or 6.0, which is backwards compatible. ⚠️ Warning: The Danger of "Repacks"
Since you can't download the shader itself, you must update the components that manage it. 1. Update Your Graphics Drivers