As stated in the subject line, my windows XP MCE does not detect my Canon SD400 camera. It did at one time, but now neither the windows nor the canon software recognize the camera when it is plugged into the USB. I know that the USB port works because I can use my flashdrive through it and I know that the cable and camera work because I can use it with my laptop. I thought there might be a driver for the camera, but Canon's website does not have one. Any suggestions?