To run the game smoothly via emulation, your PC needs modern, robust components. Windows 10 or Windows 11 (64-bit).
The open-source Xbox 360 emulator, , has made massive strides in compatibility over recent years. Forza Horizon 1 is now highly playable from start to finish on capable PC hardware through this software. System Requirements for Xenia Emulation Forza Horizon 1 Pc Download Highly Compressed