In my earlier post, I could not download Pics from my new Cannon SD600. I have a new Dell E521. I bought a SD Card Reader and still can not download Pics. When I plug the Card reader into the USB port in recognizes the hardware and then the "found new hardware wizard" appears. As the wizard takes you through the steps to install the new hardware it will eventually say "can not find file "usbstor.sys." I would appreciate any suggestions.