How to Set Up a Canon Pixma MP620 Printer Without a Disc

Turn on the Pixma MP620 and the computer you wish to use with the printer. Do not plug the USB cable into the devices at this time.
Open the computer's Internet browser and go to Canon's home page. Type 'Pixma MP620' into the blank box next to 'Search' and press the 'Enter' button.
Click the 'Drivers and Software' option under the MP620. Click on the operating system your computer has installed using the pull-down menu labeled 'Select OS.'
Click on the link under the 'Drivers' section, then click the 'I Agree -- Begin Download' button to begin downloading the latest driver onto your computer. Click the 'Run' button once the software has finished downloading.
Follow the instructions on the screen, which vary according to the operating system installed on your computer. When the software prompts, plug the USB cable into the back of the MP620 and the computer.