Your CPU is too weak for software shaders. Try turning down resolution to 320x240 or 400x300. Also, close all background processes (browsers, antivirus) to free CPU cycles.
The Internet Archive hosts a preserved copy of the original Swift Shader 3.0 SDK. Look for the file named SwiftShader_3.0_x86.zip . This contains: Swift Shader 3-0 Download For Pc 32 Bit
Go grab that DLL, drop it into your favorite old game folder, and watch those polygons fly – all without a dedicated graphics card. Your CPU is too weak for software shaders
This "DLL injection" forces the game to send its graphics commands to the Swift Shader library instead of the hardware GPU. Swift Shader then processes these commands on the CPU and sends the final image to your screen. close all background processes (browsers