: Right-click the SmarThru icon -> Properties -> Compatibility -> Run this program in compatibility mode for "Windows 7".

The Samsung SCX-4521F was released during the era of Windows XP, Windows Vista, and Windows 7. Because HP now manages Samsung printer support, official software updates for Smarthru 4 have ceased.

Click to save the executable installation file ( .exe ) to your computer.

Check "Run this program in compatibility mode for" and select or Windows 8 . Click Apply and then OK . Run the installer. 2. Install the Driver First Ensure your Samsung SCX-4521F printer is connected via USB and turned on. Install the Samsung SCX-4521F Universal Print Driver Go to product viewer dialog for this item. first. Install the Samsung SCX-4521F Scan Driver Go to product viewer dialog for this item. second. 3. Install SmarThru 4 Run the SmarThru 4 installer you prepared.

: Available for free in the Microsoft Store.

This is the newer replacement for Smarthru. It is fully compatible with Windows 10/11 and often available on the same HP support page for the SCX-4521F. Share public link

If Smarthru 4 refuses to install due to institutional IT security restrictions or unresolvable Windows 11 compatibility glitches, you do not need to throw away your Samsung SCX-4521F. You can use modern, lightweight alternatives that talk directly to the printer's hardware engine:

is an older model. If SmarThru 4 does not work correctly on a modern PC:

When looking for the software today, you have three primary routes to explore depending on your operating system and needs: 1. The Official HP Support Route (Safest)

To use its scanning and document management features fully, you need the companion software: .

is one of evolution and a significant corporate transition. Originally developed by Samsung to empower its versatile multi-function printers, the software has since moved under the management of

Unplug and re-plug the USB cable. Ensure it is connected directly to the computer, not a USB hub.