Reinstalling the scanner driver from the CD-ROM (Windows)
CanoScan Drivers Download for Windows 11/10/7 (32-bit & 64-bit) - MiniTool Partition Wizard
Canon imageFORMULA R40 Office Document Scanner for PC and Mac, Color Duplex Scanning, Easy Setup for Office Or Home Use, Includes Scanning Software : Amazon.ca: Office Products
Canon launches plug and play scanner for home offices and small businesses - Canon Press Centre - Canon UK