If a user logs out of Windows with a local Avanti instance running, or if Windows is shutdown with one or more Avanti instances running, the Avanti instances will crash.  This is equivalent to pulling the plug on a physical Alpha system and crashing the OpenVMS or Tru64 UNIX operating system.  All of the potential problems and caveats of an OpenVMS or Tru64 UNIX hardware crash apply when Avanti is terminated in this fashion.