I have owned a Canon Pixma Mp750 Muli-functional printer for several years and it has always worked perfectly on my Windows XP PC. I have purchased a new Windows 7 PC and updated the printer and scanner drivers from the Canon download website. The printer works great, but the scanner won't scan. I've tried using the MP Navigator, Scangear and the Windows Scan & Fax facility but the process only gets as far as the calibration stage and stops. I eventually get an error code 2,178,0. I have tried to resolve it by changing the USB port, uninstalling the drivers and re-installing them, but the scanner still won't scan. Any ideas, guys? The Canon support team appear to think it is a Windows error, but I'm not so sure. The drivers all seem to be installed correctly.