I have an HP Pavilion A6234X desktop computer. The LightScribe DVD SuperMulti Drive/CD Writer that came with the computer has stopped working. I have tried to update the driver several times, uninstalled it twice and the computer tried to re-install it twice, but it is not recognized by my system. Is there a fix for that from HP, or must it be replaced? If it does need replacing do you have them in stock? Is there an external one available?