There are two possible locations where you can download the software (driver and CaptureOnTouch) for the R40: https://www.usa.canon.com/internet/portal/us/home/support/details/scanners/ document-scanner / imageformula -r40-office- document-scanner ?tab=drivers_downloads Canon USA website:
Other Requirements Use the USB interface provided as standard with your computer. However, normal operation is not guaranteed with all USB interfaces, even if present as standard equipment on the computer.