I and bought a new Microsoft Natural Ergonomic Keyboard 4000 keyboard. I am using a Dell Dimension 2400 PC. The keyboard offers a plug and play interface. When I connect the usb it is detected but it is not install. There is no light on the keyboard nor it responds at all. At last I am getting a message on the screen that the keyboard is not installed. I checked in Device manager and there is a unknown device located. It looks the keyboard is not compatible with my system. Any suggestions.
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