Canon POWERSHOT SD400 DIGITAL ELPH User Manual page 150

* With the _ facing in the direction shown, insert the interface
cable until it clicks into place.
* Treatthe connector area with great care while you attach and remove
the interface cable.
USB Port
DIGITALTerminal
Interface Cable
* Always grasp the connector's sides to remove the interface cable
from the camera's DIGITAL terminal.
Select [Canon CameraWindow] i n the eventdialog that
appearson the computerand click[OK](first time only).
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If the event dialog fails to appear, click the [start] menu, and select
[Programs] or [All Programs], followed by [Canon Utilities],
[CameraWindow], and [CameraWindow].