Unexpected Termination

1. I enter the game, and then in 5 or 10 seconds, my program closes with no message, but when I press Alt+Tab, I receive an error message referring to MFC42.DLL.
2. The game suddenly quits and displays "Legend check point 1".
3. The game suddenly quits everytime I read mail.
4. The game suddenly quits and displays "Runtime Error ... abnormal program termination."
   • The map you are on contains an object that your client failed to load. Please report your exact location.
5. The game suddenly quits with a different problem.