I have the same problem. I bought Forza Horizon 3 and everything ran so smooth until yesterday. Since yesterday, I am expiriencing startup problems with Forza Horizon 3. It crashes in the "Playground" logo, and it does'nt leave and error code or log. I googled it and it said that it may be caused because of Avast Antivirus. I uninstalled Avast but it did'nt help. I also raed that it helps to disable the mic for the game but it did'nt change a thing. Can you help me with this? I just want to play Forza Horizon... Thank you.
(sorry for bad english)