If there's no promotion, then the only free way is via Game Pass. Otherwise, they need to buy it. Also, the user might be looking for a way to download it without paying, but I need to ensure that I'm not suggesting anything that's against the law or Microsoft's terms. So advising them against using pirated copies is important.
Structure the guide step by step: check if they have Xbox Game Pass, if so, download via the Microsoft Store. If not, explain the options like subscribing to Game Pass or purchasing. Also, make sure they have the right system requirements for Windows 10. descargar forza horizon 5 para windows x10 gratis
Wait, Forza Horizon 5 is part of Xbox Game Pass Ultimate, right? So if someone has a subscription, they can download it for free. The user might not be aware of this. I should explain that first, how to do it through the Xbox Game Pass. If there's no promotion, then the only free