My PC stopped recognizing my camera when attached with USB cable. I just plugged memory card into PC after that thinking the cable was bad. I have a new 20GB hard disk drive camera that I NEED to attach by USB cable and the same thing is happening. When attached and camera is turned on, I hear the audible chime from the PC that it is attached, but cannot access. MY COMPUTER does not show the camera is attached. Changed USB ports and same thing. Unpluged printer USB cable and used that port, still not recognized by PC, but the printer does work. No help from HP or Windows support, they tell me to reinstall my software, which has been done. Can you offer any advice????