This is asking me to go to places where confusion (for me) reigns. I learned some lessons some time ago and they were a tad costly.The Drive Door does open, no problems, but it does not recognise the CD.
My own modest searches suggest that it is a registry problem, rumours on the net that I-tunes is to blame. May be right but on my travels I note that I-tunes will not load properly (latest by the way). Several attempts to load that come to nought. The error message there suggests re-installing. Trying an earlier version got me nowhere.
By the way the registry problem alleged by FIXIT and others suggests upper and lower filters could be at the root of problem but no understandable instructions.
I was prepared to do a reset, but everything I have seen suggests that is probably not necessary. The laptop apart from the above is working well,.