Canon S 820 User Manual page 151

There may be a problem in the printer driver. Uninstall the printer driver and
reinstall it.
If the printer is connected to the USB interface, follow the procedure "Notes on Handling
the USB Interface (for Windows Users)" in the Quick Start Guide .
If the WPS driver or CAPT driver is installed, either uninstall it or change the driver
port to FILE as follows.
1
Click the Start button, then click Settings and Printers.
2
Display the WPS or CAPT driver properties, and click the Details tab.
3
Change the Print to the following port field to FILE.
Uninstalling Printer Drivers
An Error Message is Displayed on the Screen
Troubleshooting
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