If your Epson Adjustment Program (AdjProg) is not opening, it is usually due to a corrupted registry key, antivirus interference, or compatibility issues OctoInkjet Troubleshooting Guide: Why AdjProg Won't Open 1. Clear Corrupted Registry Keys
AdjProg is often built using older versions of Visual C++. If your computer is missing these "redistributables," the app will either not open or show a .dll missing error. adjprog not opening