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A pop-up dialog should read "A function was finished" or "Operation completed successfully" .

The software cannot communicate with the printer's firmware. canon service tool v5204 upd download

Opening the Maintenance Tool (Canon IJ Printer Assistant Tool) A pop-up dialog should read "A function was

Because this software interacts directly with hardware registers and is often distributed as a standalone technician executable, Windows Defender or third-party antivirus programs may flag it as a false positive. You may need to temporarily disable your real-time protection or add an exclusion to run the program. Step-by-Step Guide to Entering Service Mode canon service tool v5204 upd download