It has been reported that a communication error occurs when the scanner is connected via USB in the Windows 11 environment. This issue is considered to be derived from the operating specifications of the OS.
There are two possible locations where you can download the software (driver and CaptureOnTouch) for the RS40: Support | Document Scanner | imageFORMULA RS40 Photo and Document Scanner | Canon USA - https://www.usa.canon.com/ Canon USA website:
Restore the registry When the scanner is connected to a computer with a camera or a computer that had a USB camera connected to it, the scanner may be unrecognized because Windows has imported a device ID that is incompatible with the WIA registry. Use the "Restoration Tool for Scanner Registry" to restore the registry.
