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Network components are upgraded by the network configuration subsystem.
To upgrade a network component
The network configuration subsystem creates an instance of the notify object and calls the object's INetCfgComponentControl::Initialize method. This method initializes the object and provides access to the component and all aspects of network configuration.
When the operating system is installed or upgraded to a different version, the network configuration subsystem calls the notify object's INetCfgComponentSetup::Upgrade method.
The subsystem calls the notify object's INetCfgComponentControl::ApplyRegistryChanges method to modify information about the network component in the registry and then calls the notify object's INetCfgComponentControl::ApplyPnpChanges method and passes the INetCfgPnpReconfigCallback interface to configure the component's driver with the upgraded information.