When i burn or read cd/dvds it becomes very slow. When i burn it starts out fine(burning at 4.0x) burn then suddenly the buffer goes to 0% and only my device buffer is moving. When it reads a disc the same thing happens i am using the LG Multi Dvd/Cd Rewriter GSA-4167b i have dma enabled my hard drive is defragged i only have burning program installed The drive is set to master