Canon BJC-55 - Manual (Page 78)

5.
Make sure that Normal installation is selected and click the Next
button.
Normal installation installs both IS Scan Plus and IS Scan. IS Scan Plus
can be run as an independent program, but IS Scan can be used only
with a Twain-compliant software application.
Select Install TWAIN driver only when you want to use the scanner
software with a Twain-compliant software application.
6.
Confirm Destination Location and click the Next button.
The installation of the scanner software begins.
Follow the instructions displayed to complete the installation.
76 Chapter 5 Daily Operation and Printer Maintenance