I have been using the above printer on my PC (Vista) for about 18 months to 2 years and suddenly it has stopped working. The green light flashes when I send a document to be printed, it starts to print but stops immediately. 'Error' then appears on my screen. I tried uninstalling and reinstalling the printer but I am advised that there are known problem in Vista with this printer - why now after all this time? The ink tanks are full. I cannot find my manual so I cannot look in the troubleshooting guide. I did try going on the internet and downloading a guide, however, the Canon manual site was not working. Can anyone help?