Hello Spruha, Based on the directory C:\program files (x86)\Texas Instruments\DAC348x, you already had the software installed because all the files that I have appeared on your screen too. I believe you may already have installed the software once in your PC. To execute the software, you may right click on DAC3484 _GUI_V3p8.exe, and run as administrator mode to see if the software executes. Please report back if you encounter additional issue. -Kang
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