The TWAIN driver is the software link between the data coming from your camera and the program into which you are importing the data. Without the TWAIN driver, your programs cannot properly communicate with the camera to download the images contained there. The TWAIN driver is installed at the same time as the rest of the software from the CDROM which came with your camera.

For instructions on installing the software contained on the CDROM, select the document "How do I install the PowerShot A5 Software Solutions software?" from our Instant Answer technical support option.