: If SmarThru 4 remains broken, HP recommends using the Samsung Easy Document Creator (EDC) , which is the modern replacement for SmarThru and is compatible with Windows 10 and 11.
The software opens but fails to communicate with the scanner over USB. Top Fixes for SmartThru 4 Software Downloads smarthru 4 samsung scx4521f software download fix top
To restore full functionality, including scanning, follow these steps to install the most compatible drivers: Locate Official Drivers : Visit the Samsung SCX-4521F Support Page on HP Manual Driver Selection : If SmarThru 4 remains broken, HP recommends