Arduino not connecting to Windows COM port

I'm having a problem with my Arduino. When I connect the board to the USB port, it doesn't show up in Windows Device Manager. The board is getting power because the power light is on. When I connect a different Arduino, it shows up in the Device Manager as COM17. The Atmega chip works fine when i swap it into the working board.

Is the USB/Serial connection broken? Is there a way to troubleshoot the communication system of the board?