For Windows Server Core/Hyper-V the Prolific USB/Serial driver must be downloaded from Windows Update Catalog onto the Windows Server Core/Hyper-V Server. The cab file must be extracted to local drive and pnputil -i -a ser2pl.inf must be run to install the driver. Windows systems with GUI need to have the Add New Device wizard check Window Update for the driver. Once the driver is installed, reboot the server so the COM port is registered in the OS.
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