Right-click the Vanguard icon in your system tray and select Exit Vanguard before launching FM18. Roll Back Windows Updates
To understand the fix, it helps to understand the problem. is a Digital Rights Management (DRM) system used by developers (in this case, Sports Interactive and SEGA) to prevent piracy. It ensures that the game is legitimate and hasn't been tampered with. football manager 2018 failed to start denuvo driver