Downloading unauthorized copies of the game is illegal.
The short answer is . Forza Horizon 2 was never officially developed or released for the PC platform. Platform Exclusivity
Forza Horizon 5 is readily available, runs natively on Windows, and delivers a far more polished and feature-rich experience than the decade-old Horizon 2. Forza Horizon 2 Pc Game Download
You download the Xenia emulator and load an ISO rip of the Xbox 360 disc.
While not a "download" in the traditional sense, some players use streaming services to experience the game. Downloading unauthorized copies of the game is illegal
Here is a blog post draft that addresses the "PC download" query while clarifying the official status and offering alternatives.
Microsoft and developer Playground Games released Forza Horizon 2 in September 2014 exclusively for Xbox consoles: Platform Exclusivity Forza Horizon 5 is readily available,
Furthermore, because of expiring automobile and music licensing agreements, Microsoft officially Forza Horizon 2 from the Xbox Digital Marketplace in 2018. This means even digital Xbox copies cannot be purchased brand new today. Beware of Fake "Forza Horizon 2 PC" Download Links
Since you cannot safely download Forza Horizon 2 for PC, why not play its superior successors? These games are 100% optimized for PC and offer a similar or better festival atmosphere.