Now, lets try and get your scanners working again! They are only telling me/you to install half of the required software in order for the the scanner to operate correctly. Tech support told me to just install the basic driver and forgo the whole IJ Network suit. I uninstalled and reinstalled to the most current Driver. As I did not see any reason why a scanner would but unsupported after an OS update yet my OS was still seeing my MX700 scanner. Now, I sat at my computer troubleshooting this issue for roughly 3 hours. FYI the used price is about the same as a brand new price on Amazon or other similar sites so, you could probably by-pass that step if you decided that is what you wanted to do. I even called Canon tech support, and as much help as the rep was able to give me, the only option he gave me was to just buy a new printer and that Canon would offer a discount on a used printer. Ok, So I had the same issue where after unpgrading to windows 10 my scanner ceased to work but printer was perfectly fine.

Canon mx700 installation software