I've found this conversation http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/windows-7-canoscan-n656u-cannon-scanner/f2368705-743d-4ca9-948f-a1ef81687a12 and the following universal scan driver http://www.hamrick.com/ Maybe that may help to keep using that scanner?
no subject
http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/windows-7-canoscan-n656u-cannon-scanner/f2368705-743d-4ca9-948f-a1ef81687a12
and the following universal scan driver
http://www.hamrick.com/
Maybe that may help to keep using that scanner?