If you ignore this warning and choose to download such tools anyway:

The Canon Service Tool V3200 is a Windows utility designed to reset the waste ink absorber counter, perform maintenance tasks, and diagnose issues on specific Pixma and G-series printers. It enables users to clear Error 5B00 by accessing Service Mode via a USB connection, though users are warned of potential malware risks and the possibility of permanently damaging printers by using incompatible versions. For guidance on safe, manual printer maintenance, visit PrinterKnowledge .