Windows 10 (especially versions 1709 and later) enforces . This means any driver without a valid digital signature from Microsoft will be rejected. Many original Letatwin LM-390A drivers from 2010–2015 are unsigned. Therefore, even if you have the original CD, Windows 10 may block the installation.
If you absolutely need full functionality: letatwin lm-390a driver for windows 10
A: Try a different USB cable (printer requires a USB Type A to Type B cable). Test on another PC running Windows 7 to verify the printer hardware is functional. If it works on Windows 7 but not on Windows 10, the issue is purely driver-related. Windows 10 (especially versions 1709 and later) enforces
Before starting the installation, ensure you have the following: : A MAX Letatwin LM-390A unit. letatwin lm-390a driver for windows 10