Inkjet printers track internal maintenance data, including waste ink volume. When the counter reaches a factory limit, the Epson M2120 displays a “Service Required” error (often error code or similar) and stops printing. The Adjustment Program (also called the Service Program or AdjProg ) is the only official method to reset this counter. This paper does not provide or link to the software but explains its operation for educational purposes.

Your "Service Required" error should be gone.

Disconnect your printer from Wi-Fi. The utility requires a direct, stable USB cable connection between the computer and the printer.

The software cannot find the printer on the selected port.

Advanced functions allow technicians to check the USB ID, reset the EEPROM (where printer settings and logs are stored), and perform system diagnostics.

Windows 7, Windows 8, Windows 10, Windows 11 (32-bit & 64-bit) File Type Executable application contained in a .zip or .rar archive Connection Requirement Direct USB Cable (Wi-Fi/Network resetting is not supported)

The Epson M2120 adjustment program is a software tool used to perform maintenance and adjustment tasks on Epson M2120 printers. This program is designed to help users troubleshoot and resolve common issues with their printer, such as paper jams, misaligned prints, and ink system problems.

Epson does not publicly distribute the Adjustment Program on its official support websites for consumers. It is a tool intended for authorized service centers. Therefore, you will not find it on Epson's official driver download pages. Instead, you will find it on third-party forums and websites [7†L29-L34][10†L5-L9]. Because of this, you must be extremely careful. Many files claiming to be the "Epson M2120 Adjustment Program" may contain viruses, malware, or be entirely fake.

It is very common for antivirus software to flag Adjustment Programs as potential threats. This is because these tools modify your printer's internal memory and counters, which are actions that can appear similar to malicious software. Most reputable reset program providers will warn you to disable your antivirus before downloading or running the software to prevent it from being blocked.

Official Epson Adjustment Programs are proprietary software. Many versions found online on free download blogs are modified or bundled with malware, trojans, or adware. Always download utilities from verified, reputable tech forums or providers, and scan all files using Windows Defender or VirusTotal before running them. Troubleshooting Common Adjustment Program Errors