I have a CanoScan 4400F and I'm using ABBYY FinReader 12 Professional. I recently upgraded from Windows 7 to Windows 10. The scanner has no Windows 10 driver, but I found reports online of people getting the scanner to work with the Windows 8.1 driver, so I installed that. Now when I try to scan an A4 sheet of paper, I only get the top third of the page. Please can someone suggest how I can get the whole page to scan?