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It is likely that whatever you are printing FROM is manually set to print to a specific USB port identifier, instead of a Windows Printer. Do not rely on Windows to provide a CORRECT driver.įor label and receipt printers like Zebra and Epson especially. What you should have done was fully remove the printer driver WHILE the printer was attached, and then reinstalled the printer driver cleanly.įor usb printers, if you can find a downloadable driver use it.
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The Prolific chipset is entirely unrelated to your USB printer. It will not show up in the device manager if the Serial Port is disabled in the bios. It has an internal PL2303 conversion chip that runs your serial port off the USB bus. The PL2303 your're bringing up is the SERIAL port on your pc.
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