Canon PowerShot A550 User Manual page 235

Windows Vista, Windows XP
You do not need to uninstall the USB driver.
Windows 2000
Uninstall the USB Driver using the following procedures.
1
Attach the supplied interface cable to the computer's USB port and the camera's
DIGITAL Terminal. Prepare the camera for communication with the computer.
For interface cable connection instructions, see the
Camera User Guide.
2
Click the [Finish] button if the Camera Control Window displays.
3
Click the [Start] menu and select
[Settings], followed by [Control Panel].
4
Double-click the [Scanners and
Cameras] icon.