Even when a driver works today, future OS updates may break it. Recommended maintenance:
Drivers for the V39 are not merely “translators” but active software packages that manage color profiles, resolution scaling, and the scanner’s LED light source calibration. epson v39 drivers
If you are using a laptop in "S Mode" (Windows 10/11 S), you can only install apps from the Microsoft Store. The Epson V39 driver is an executable file downloaded from a website. Even when a driver works today, future OS
On modern macOS, after installing the driver, the system might block the software because it is not notarized by Apple. Even when a driver works today
Incorrect driver installation is the #1 cause of “scanner not found” errors. The correct order is critical: