: You can find the legacy 2.1 d3d8.dll and d3d9.dll files on community sites like ModDB or GitHub archives.
: Extract the d3d9.dll (for DirectX) or libEGL.dll and libGLESv2.dll (for OpenGL) files from the SwiftShader folder. Swift Shader 2.1 Download
Single-core CPU or background processes. Fix: Close browsers, set Windows Power Options to “High Performance,” and reduce game resolution to 800x600. : You can find the legacy 2