, as SmarThru 4 is no longer officially supported by HP/Samsung for current operating systems. HP Support Community 1. Recommended Software Fixes SmarThru 4
"There's a specific issue with the software window on newer computers. The top toolbar gets cut off. It’s a known bug. You need to look for a file labeled 'fix top' in the zip folder smarthru 4 samsung scx4521f software download fix top