Ok, not sure if you have this app or not - https://www.microsoft.com/en-us/store/p/windows... - windows scan for windows 10 - download and give it a shot.
If no dice, go here - https://www.canon.co.uk/support/consumer_produc...(64-bit)&language=EN
And download / install the driver labeled:
Windows 64bit] MF635Cx/MF633Cdw MFDrivers (UFR II / Generic Plus PCL6 / PS3 / FAX / ScanGear)
Download: 0100855801
Release date: 21 March 2017
The scan portion may reinstall and help it out!
Let me know!
- C