A printer driver is a software program that enables your computer to communicate with your printer. It translates the print commands sent from your computer into a language that the printer can understand. Without a printer driver, your computer will not be able to print documents or images.
Hardware failure. Run the printer in (Power + Resume button sequence) and use the Canon Service Tool to reset the EEPROM. Search YouTube for "Canon F66400 service mode fix." canon f66400 printer driver full