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Thank you for using Canon products.
Changes:
Firmware Version 1.0.4.0. incorporates the following improvement:
1. Improves network access security.
Firmware Version 1.0.4.0. is for printers with firmware up to Version 1.0.3.0. If the printer's firmware is already Version 1.0.4.0., it is not necessary to update the firmware.
Further information:
