Ok, please follow the steps below to uninstall the printer software completely using the Windows Install Cleanup TOOL and then re-install it:
1- Unplug your printer from the computer
2- Uninstall the Canon printer software going to Start, Control Panel, Uninstall a Program
3- Download "windows install cleanup" tool. Go tohttp://wikisend.com/download/563316
and click on "Download file" to download and install this tool
4- Remove any Canon printer application using this tool. (if you find any)
5- Restart the computer BUT PLEASE FIRST BOOKMARK (add to favorites) THIS PAGE SO YOU CAN COME BACK WITH ME AFTER THE RESTART, and click Accept if the issue is solved (that's the only way I can get paid for my effort. Thank you).
6- Download the newest driver here:http://www.usa.canon.com/cusa/support/consumer/printers_multifunction/pixma_mp_series/pixma_mp510#DriversAndSoftware
Scroll down and then click the red triangle next to "Select OS" and select "WINDOWS 7 (X64)"
Click "mp510win111ej.exe" 10/26/2009 11.67 MB
Select I Agree - Begin Download
Save the file to your desktop, then double click it to start the installation.
7- After the new driver is installed please restart your computer (BUT PLEASE FIRST BOOKMARK (add to favorites) THIS PAGE SO YOU CAN COME BACK WITH ME AFTER THE RESTART, and click Accept if the issue is solved (that's the only way I can get paid for my effort. Thank you)
8- Turn on your printer and plug in the USB cable to another available USB port in your computer and try to scan now.
9- Please let me know if the issue is solved or not clicking "Reply to your expert", so we can continue troubleshooting
10- If I helped please scroll down and click the Accept button for me to be paid :-) (even if you have a subscription or a trial membership)
Computer Science Engineer*** 4 IMPORTANT THINGS *** (please read them)
1- Please click the ACCEPT button, so your deposit can be released and I can get paid for my effort. (*** Even if you have a subscription plan, you need to click the Accept button if the issue is solved for me to be paid, you won't be charged twice ***, don't worry. Thank you!)
2- Let me know if the answer doesn't work INSTEAD of leaving negative feedback, so we can still continue troubleshooting the issue.
3- Positive Feedback is very important to us. Please leave me a positive feedback after you are happy with the answer.
4- Any bonus will be greatly appreciated