The Windows 3.1 Setup program will automatically update any installed printer drivers with new drivers provided with Windows 3.1. As part of this process, Setup will replace:
generic printer name=driver, port
in the [Devices] and [PrinterPorts] sections with:
specific model name=new driver, port
Setup will not update the [DriverName, Port] section. This will be done by the individual driver when Setup calls the DevInstall function.