I have another troubleshooting when I try to launch the game.
When I launch it, I systematicaly have this message (in attached images) "Cannot start Hercules from here. Run the installed copy". What does that mean ?
I tried to go in the compatibility tab as previously adviced, I tried to launch it as administrator, I tried to set it up to run in windowed mode, but nothing has changed.
I was so happy to play to that game I had when i was a kid, and drink a lot of HERCULADE !... You would make someone happy if you know what to do to fix this ! :')
Thank you everyone !