My WF 3520 suddently stopped printing. I changed the cartridges still no joy. Then removed all trace of the programme in the registry, downloaded the installation software and reinstalled. Connected with ethernet and printer fired up normally. However, following installation the printer icon does not show in my PCs control panel. When adding a device, Windows 10 did find it and I was able to add it as my default printer. Still no icon in Control Panel. Everytime I try to print a page it simply throws out 2 blank sheets and reports a jam. Have cleaned all the rollers and all feed mechanisms seem normal. The scanner appears to work normally. Any suggestions as to what might be the cause?