Epson LX 300+II Reference Manual page 91

If your drivers are correctly installed, EPSON USB Printer
Devices should appear on the Device Manager menu.
If EPSON USB Printer Devices does not appear on the
Device Manager menu, click the plus (+) sign beside Other
devices to view the installed devices.
If USB Printer appears under Other devices, the
USB printer device driver is not installed correctly.
If EPSON LX-300+II appears, the printer driver is not
installed correctly.
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Maintenance and Troubleshooting