Epson EPL-N2550 Series User Manual page 261

If EPUSBX: (your printer name) is displayed in the "Print to
the following" port drop-down list, then the USB printer
device driver and printer software are installed correctly. If
the correct port is not displayed, proceed to the next step.
2. Right-click the My Computer icon on your desktop, then
click Properties.
3. Click the Device Manager tab.
Troubleshooting
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