Bonjour,
Si d’autres personnes comme moi n'ont pas réussi a démarrer le jeux sur PC a partir de steam, j'ai enfin trouvé la solution sur un forum anglais (j'ai fait un simple copié-collé ^^):
go through here......
1.) Go to Control Panel....
2.) then System and Security
3.) then go to SYSTEM
4.) look for the link name "ADVANCE SYSTEM SETTINGs"
5.) the window will pop-up don't panic just look for Advance tab
6.) in Performance area click on "SETTINGS" button
7.) now another pop-up go to "DATA EXECUTION Prevention" tab
8.) Choose "Turn on DEP for all programs" and ADD ffxiiimg.exe from the folder that you contain your games
such as " D:\GAME_STEAM\SteamApps\common\FINAL FANTASY XIII\white_data\prog\win\bin"
9.) FULL SCREEN WORK JUST FINE do it
enjoy Hope u guys have fun
En espérant que sa vous aide ! Bon jeux ! ^^