Installing a scanner is quite simple but I ran into serious problems in more that one occasions. On every occasion, I saw blogs full of frustrated people so I decided to write a small summary as a sum of lessons learned from bad experiences. Use these guidelines only if you are having problems installing or running your scanner.

1. Uninstall all software/drivers associated with printers and scanners you had installed before, if you will no longer be using them.
2. Turn off your antivirus
3. Shut down all software concerning graphics and related to printers.
4. Kill all process concerning software updates
5. Go to Control Panel > System > Device Manager > Imaging Devices. Uninstall what you see.
5. Follows installation instructions provided by the device manufacturer. I mean follow it step by step and word by word.
6. Attach the USB device to your computer only if you are asked to do so by the installer or when the installation is complete and the computer has been restarted.
7. The first time you scan, the scanner calibrates the device. Make sure that you DO NOT have any document in your scanner at this time. Place your documents inside for scanning only when the calibration is complete.

If all this does not work, then delete entries from the registry. Caution, this is very risky and you should this only if you know how to fix a malfunctioning computer or if you are truly desperate.

1. Start > Run > type regedit > OK
2. Expand HKEY_CURRENT_USER > Software > Canon
3. Delete the folder Canon
4. Restart your computer