Solution
1. Make sure the machine is connected to your computer using a USB cable and the machine is turned on.
2. For Windows XP, click [Performance and Maintenance] in the [Control Panel] folder, then click [See basic information about your computer] in the [Performance and Maintenance] folder. For Windows 98/Me/2000, double-click [System] in the [Control Panel] folder. The [System Properties] dialog box appears.
3. For Windows 2000/XP, select the [Hardware] tab, then click [Device Manager] and double-click [Universal Serial Bus controllers]. For Windows 98/Me, select the [Device Manager] tab, then double-click [Universal Serial Bus controllers].
4. Locate the USB class driver under [Universal Serial Bus controllers]. Delete ONLY the USB class driver specified for your operating system. For Windows 2000/XP, select [USB Printing Support], and click [Uninstall] from the [Action] menu. For Windows 98/Me, select [Canon L120], and click [Remove].
NOTE
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 L120], or [Unknown].
5. Close the [Control Panel] folder, then unplug the USB cable.
6. Restart your computer.