The process of downloading the Canon Camera Twain 6.4.4 R3 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Canon Camera Twain 6.4.4 R3 driver from the primary server - this is the manufacturer’s CANON official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the Canon Camera Twain 6.4.4 R3 diver.