On dual NIC systems (this includes systems with a hardware NIC and a wireless NIC), it is best to disable TCP/IP services on the NIC assigned to Avanti.  Prior to launching Avanti, open the Properties box of the NIC assigned to Avanti and uncheck all items assigned to the NIC.  This will prevent Windows from trying to share the NIC with Avanti.  For users running Avanti on a system equipped with both a wired and wireless NIC, assigning Avanti the wired NIC will provide more stable network performance.