In order to do the Canon PIXMA MX490 Setup,you need to know the SSID and the passcode of it which will be WEP Key or WPA.
After having all the information and connect your computer with the scanner directly or by using a USB cable.
Make sure that internet access is available. Now after connecting all the device with each other download the installation file from the website. Before downloading the installation file make sure that it is compatible with your printer model.
Now after having the successful installation process fill your personal data correctly and then you are ready to use your printer on the window.