If TWAIN scan applications quit unexpectedly when launching or display an error message then quit, move third party data source files from the TWAIN Data Source folder*.
If, after upgrading your computer's operating system from Windows Vista to Windows 7 and you receive an error message while printing, network printing or scanning is unsuccessful (built-in network capable printers only) or PC Faxing (MP530 and MP830 only) is unavailable, uninstall and reinstall the Canon MP drivers.
When installing or replacing an ink tank, only one of the following ink tanks should be installed. If the ink tank is not installed correctly, an error message will display.