It well maybe that the disk version of The Witcher:EE is protected with some kind of copy-protection method thus causing the error (Tages comes to my mind). You can check if that's the case by running a tool named Protection Id against the game executables. http://pid.gamecopyworld.com/ Code: The first is "Insufficient Privileges: You must be an administrator to run this program." Which is odd because I am an admin. Running Wine as root is highly discouraged.