Avanti processes run one of two ways: as a user mode process or as a service. If a user mode session is terminated, the Avanti process disappears with it. If a Windows system is rebooted, the Avanti service will be terminated. Either way, the virtual Alpha is crashed.
Recommendations
•When running Avanti as a user process, disable auto-logout of the user process.
•When running Avanti as a service, disable Windows automatic updates and reboots.