Canon i 850 - Manual (Page 167)

Problems Unique to Windows 167
Troubleshooting
Cannot Print Normally
■ When the printer port is set to "ECP", cancel ECP mode and then try printing
again.
Sometimes ECP mode disrupts normal printing.
1
Open the Printer Properties dialog box.
2
Click the Maintenance tab.
3
Click Custom Settings to open the Custom Setting dialog box.
4
Clear the Set printer to ECP mode check box, and then click Send.
5
Turn the printer off and back on again.