Windows Vista Service: dot3svc
The Wired AutoConfig Service performs IEEE 802.1X authentication on Ethernet interfaces.
Default Startup:
Home Basic
Home Premium
Business
Ultimate
Manual
Manual
Manual
Manual
Depended Services:
Services
Home Basic
Home Premium
Business
Ultimate
Extensible Authentication Protocol
NDIS Usermode I/O Protocol
Remote Procedure Call (RPC)
Required Services:
Services
Home Basic
Home Premium
Business
Ultimate
None
None
None
None
None
Without dot3svc Wired AutoConfig Service your network cards/adapters will not show in Network Connections and you simply won't be able to connect to any network via network cable.