If this box is disabled, XShutdown will show you a confirmation window every time it tries to close a session that cannot be closed automatically. This applies to all non-Presentation Manager sessions, i.e. OS/2-text mode, DOS and Win-OS/2 sessions. You will then get a chance to save data before the session is closed.
If this setting is enabled, XShutdown will kill these session without further notice. You will not get a chance to save data then. Use this setting with care.
Note that this setting only has an effect if the Extended Shutdown or Restart WPS features
are enabled.