Samsung's printer division was acquired by HP (Hewlett-Packard). Consequently, the old Samsung download pages have been moved or archived.

Look for the "Software" tab (distinct from "Drivers"). Download the file usually named Samsung_SCX-4x21_SERIES_SP.exe or similar. Installation Steps For the most stable setup, follow these steps: SmarThru4 - Download

The is a reliable monochrome multifunction printer (printer, scanner, copier, and fax). While modern operating systems often include basic drivers, many users require the original SmarThru 4 software suite to access advanced scanning features, image editing, and document management tools.