I am currently on Win10 build 10158 and none of the Canon drivers for my Pixma ip8750 two year old printer work correctly. There seems to be a break in communication between the app being used for printing and the OS handling the printer driver preferences. Thus regardless of how I setup the printer from within the app, the output is configured as the printer driver was last setup direct from the desktop.

Canon have absolutely no information on any of their numerous websites about Win10 except for this one instance which made my heart run cold:

"Microsoft have announced that Windows 10, the new version of their operating system, will be released on 29 July 2015. This will be a free upgrade for current users of Windows 7, Windows 8, Windows 8.1 and Windows Phone 8.1 devices.

We are currently determining our driver support for this new operating system and this page will be updated with further information shortly.

Canon takes those decisions in the knowledge that the production of drivers and software support comes at a direct financial cost. So, while Canon certainly respects our customerís choice to decide to upgrade technologies, Canon cannot guarantee that older Canon products will continue to be supported by the new operating system."