You may need to manually adjust paper size and orientation in advanced settings for perfect alignment.
Download the official Samsung ML-1640 driver for Windows 8.1 or 10 from a trusted archive (e.g., HP’s legacy support page or a reputable driver repository). The typical file name is ML-1640_Series_Win8.1_...exe . samsung ml-1640 driver windows 11
90% – Highly reliable, but installation is slightly more technical. You may need to manually adjust paper size