Solution
1. Make sure the machine is connected to your computer using a USB cable and the machine is turned on.
2. Double-click [System] in the [Control Panel] folder.
The [System Properties] dialog box appears.
3. Select the [Device Manager] tab and double-click [Universal Serial Bus controllers].
4. Select the USB class driver under [Universal Serial Bus controllers]. Delete ONLY the USB class driver specified for your operating system. (If the USB class driver is displayed under [Other device], delete ONLY one of the following, depending on your operating system: [USB Printing Support], [Canon MF3200 Series], or [Unknown].)
Select [Canon MF3200 Series] and click [Remove].
5. Close the [Control Panel] folder and unplug the USB cable.
6. Restart your computer.
