I also have a similar problem as the scanner does not funtion anymore and yet the printer and fax work ok although it has worked perfectly since the orignal installation when I upgraded to the free update for Windows 10.However about a month ago the toolbox displayed the following error message:
" A supported scanner is not installed. Please install a supported scanner and then restart"
I can install the toolbox driver and overwrite any previous versions but the scanner still has the error message.
I have uninstalled both the printer and driver quite a few times but with no success.
Cannon have also tried to assist, plus our IT guy, plus the local technician in my part of the world but it still does not work.
I tried uninstalling Google Chrome but that did not help either. Hopefully someone has a solution?