I recently received an HP DVD840e Super Multi DVD Writer with Lightscribe. It connects to my computer via a USB port, which I have checked and established as being USB 2.0. The trouble is that it's taking me close to 4 hours to burn a disc, which I know is twice as long as what it should be. Does anyone know what could be slowing down the USB connection in any way? Or perhaps any other cause for the lag?