Thank you for the update. It sounds like you don't have the updated drivers installed. Please, download and install the drivers from the following website for Windows 10: http://www.canon-europe.com/support/consumer_products/products/fax__multifunctionals/laser/laserbase_mf_series/i-sensys_mf4780w.aspx?type=drivers&language=EN&os=Windows%2010%20(64-bit)
After you download, open, and install the aforementioned drivers, all should be good.
If you need anything else in the future, please let me know.
Thank you for your time today.