Finally cured the:
Event Type: Error
Event Source: RemoteAccess
Event Category: None
Event ID: 20106
Time: 9:49:43 AM
Unable to add the interface Internal with the Router Manager for the IP
protocol. The following error occurred: The parameter is incorrect.
0000: 57 00 00 00 W...
...which appeared in my event log on every boot. Did a search on the
Microsoft site for the 20106 error code and found a hint to enable the
computer as a Remote Access server (right click on Routing and Remote
Access in Computer managment and select Properties). Voila.... the error
disappears from the Event log.... BUT.... now my modem answers every
incoming call, even if I have things set to deny connections for all but
one hour in the wee hours.... any hints???