I have not done anything different to my pc but my cd drive is gone. It does not show up in device manager or anywhere else on my computer. I am able to still put in cd's and the drive starts to read them, but then nothing. This has been doing this for about two months. It did oneday pop up and start working again, until norton poped up and scaned my pc. How can I get this working again permanetly. And why did it just dissapear.