Classic Project IGI (2000) DirectInput keyboard conflict on modern Windows. Fixes:
IGI needs D3DX9_43.dll / d3dx9_30.dll etc. Modern Windows lacks legacy DirectX 9 runtime.
dgVoodoo.conf, dgVoodooCpl.exe, d3d8.dll, d3dimm.dll, ddraw.dll to game folder. Run dgVoodooCpl.exe → Set Resolution, Force MSAA, Disable "Enumerate Refresh Rates". Fixes video + input.Order: Compatibility Mode → DX9 Redist → dgVoodoo2 → Locale English. Usually solves it.