Hello Livingston.
The drivers automatically downloaded by Windows operating systems are pre-installed drivers created by Microsoft themselves. These pre-installed drivers do not support all functions of the printer, and may experinece problems for which we're unable to provide support.
Try removing the current printer entry, then downloading and running the Canon-produced drivers from the MF644Cdw Drivers & Downloads page. You should only need the one listed in the Recommended Drivers section.
If you need immediate assistance with this issue, please contact us using the numbers and information at http://Canon.us/ContactLI
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