Have you clicked on the USB device in the device manager and selecting updated the driver, pointing to - C:\Program Files (x86)\arduino-1.0.6\drivers - (or your folder on your computer) then press enter?
Have you clicked on the USB device in the device manager and selecting updated the driver, pointing to - C:\Program Files (x86)\arduino-1.0.6\drivers - (or your folder on your computer) then press enter?