Canon service tool version 5510 or higher - PrinterKnowledge

While the itself is a necessary utility for professional printer maintenance, the "free download without password" versions found on the open internet are overwhelmingly fraudulent.

If you own a Canon Pixma printer, particularly models like the MG2520, MG3620, MX490, or TS series, you have likely encountered the dreaded or "5B01" error code. This error signals that the printer’s internal ink waste pad is nearly full. Canon designs these printers to shut down completely after a certain amount of printing, forcing you to visit a service center.

: Clears the internal counter that tracks ink saturation in the printer's sponges.

Many "no password" versions found on third-party sites are flagged as Trojans or viruses that exploit vulnerabilities like WinRAR to inject malware.