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. Locate the USB class driver under [Universal Serial Bus controllers].
Select [Canon MF8100 Series] and click [Remove].
IMPORTANT
Never delete other devices or device drivers. Windows may not operate properly.
5. Close the [Control Panel] folder and unplug the USB cable.
6. Restart your computer.
