Warning: Always scan archived downloads with Windows Defender or Malwarebytes before opening.
Because official support for this specific model is obscure, many "Driver Download" websites that appear in search results for "Nextep NE510" are unsafe. Do not download executable (.exe) files from generic driver sites (e.g., driverguide, drp.su, or unknown domains) as they frequently bundle malware. nextep ne510 driver windows 7 link
Right-click the downloaded setup file and select nextep ne510 driver windows 7 link
If the printer prints random symbols, ensure the driver is set to the correct emulation (ESC/POS). nextep ne510 driver windows 7 link