Canon S900 User Manual page 138

Ensure the correct printer driver is selected.
In Windows, ensure that Canon S900 is selected in the Print dialog box.
In Macintosh, ensure that S900 is selected in the Chooser.
Note
In Windows, you can set the Canon S900 as the default printer.
Ensure the printer port is set correctly.
Set "USBPRNnn" or "USBnnn" ("n" represents a number) as the printer port.
1
Open the Printer Properties dialog box from the Start menu.
2
Click the Details tab (or Ports tab) and set the printer port.
Opening the Printer Properties dialog box directly from the Start
menu
Windows
Printer Does Not Start or Stops During Print Jobs
Troubleshooting
138