Hi I'm sort of new here and I need help trying to help my sister-in-law. She just bought a computer with Vista on it and I helped her setting it up. At the same time, she got a Vivitar 3815 camera. After setting up the computer, I hooked the camera to the PC with a USB cable and everything went fine. Then, I unhooked the camera and hooked a brand new USB thumb drive to the PC and again, everything was fine. The problem started when I then tried hooking the camera back to the PC. As soon as I power up the camera, I now get a message in the tray stating I can safely remove the USB device. When I doubleclick on the message, it even states that the device is a Vivitar 3815 camera but Vista just will not recognize the camera as a removable drive anymore. I have hooked the camera to another Vista PC and it works fine and Vista had no problem identifying it (as it was the case initially with my sister-in-law's PC). It's as if the PC didn't like having a camera hooked up , then a USB drive hooked up and finally the camera being hooked back. It doesn't make any sense to me. If anyone can offer a solution, it would certainly be welcomed. thanks PS: I have tried hooking up the camera in other USB ports, with the same results.