I have the very same problem , on windows 7, when connect a device appear: " Windows found software for your device but encountered an error while attempting to install", when it try automatically install the driver. It appear in device manager with a yellow tringle but cannot transfer data on usb memory stick and mp3.
any idea?
when try to install manual the newest driver for any, it appear: "Windows found software for your device but encountered an error while attempting to install Acces denied. (Code31).