Once you have downloaded the MFP driver package from the official Samsung website, you can proceed with the installation.
, you should visit the website. HP acquired Samsung’s printer division and now hosts all legacy drivers and applications. Official Download Steps
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| Symptom | Likely Cause | Solution | | :---------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | The full MFP software is not installed, or there is a communication problem. | Uninstall any existing drivers, restart your PC, and reinstall the full MFP package from the Samsung website. | | Windows won't find the driver | You are relying on automatic Windows Update, which may install a basic driver. | Disconnect the USB cable, manually run the Samsung_SCX-4x21_SERIES_PD.exe installer you downloaded, and reconnect the cable when the installer asks for it. | | SmarThru won't launch or crashes | The installation was incomplete, or another program is interfering with the print spooler service. | Restart the Print Spooler service on your PC. Restarting the spooler service is a common, safe way to resolve a wide range of printing and scanning software conflicts. | | "Samsung Software"" error | Older driver signing issues can sometimes prevent Samsung software from installing correctly on the most recent Windows 10 and 11 security updates. | Temporarily disable Driver Signature Enforcement during boot or run the installer in Windows 8 compatibility mode. This is an advanced step and should be done carefully. |
: Look for a file name similar to SmarThru4_V4.x.x.exe or SmarThruOffice_V2.x.exe (SmarThru Office is the modern successor to SmarThru 4). Once you have downloaded the MFP driver package
The most reliable way to obtain the correct software for your specific hardware is through the HP Customer Support - Software and Driver Downloads portal.
Are you connecting the printer via or a network adapter ? Official Download Steps This public link is valid
If the software is very old, right-click the setup file, select , go to the Compatibility tab, and select Windows 7 or Windows 8 . 2. Installing the Software Run the driver installer ( .exe file). Follow the on-screen instructions.
Downloading and installing SmarThru 4 is a straightforward process. Here's a step-by-step guide: