Most adjustment programs must be executed as an administrator to communicate properly with the printer via USB. Check the Pad:

Many "free" adjustment programs are flagged as viruses by antivirus software. Most guides recommend disabling your antivirus to run them, which is a major security risk. Hardware Hazard:

printer when you encounter "Service Required" errors (typically due to a full waste ink pad), you can use the (often called a "Resetter"). How to Use the Epson L5290 Resetter

: A professional tool that is free to download for diagnostics.

These communities are the most active in reverse-engineering Epson firmware. You can find genuine adjustment programs here, but the interface is often in Cyrillic or Mandarin, and navigation requires technical skill.