To find the correct driver for your series printer, please go directly to the official Canon support site:
If you need help installing or troubleshooting once you have the driver, let me know your operating system and I can provide specific steps. mx490 driver
(If you are outside the US, change the region in the top-right corner of the Canon website.) To find the correct driver for your series
https://www.usa.canon.com/support/p/pixma-mx490 mx490 driver