An Error Message is Displayed on the Screen 167Troubleshootingn Ensure that the printer port setting corresponds to the printer interfaceconnection.Open the Printer Properties dialog box from the Start menu, and click the Details tab (orPorts tab). If USBPRNnn (Canon S820D) or USBnnn (Canon S820D) ("n" representsa number) is displayed, the USB port is selected.á Opening the Printer Properties dialog box directly from the StartmenuIf the setting is incorrect, shut down Windows, turn off the printer and either connect theprinter to the interface selected in the printer driver, or install the correct printer drivercorresponding to the interface.n There may be a problem in the printer driver. Uninstall the printer driver andreinstall it.á Uninstalling Printer DriversAlso refer to the procedure “Notes on Handling the USB Interface (for Windows Users)”in theQuick Start Guide.