Give me the solution for my dvd problem

Close windows explorer and remove the disc and then put the disc back in and wait 20 secs or so so that the computer can recognize the cd (hopefully) and then open explorer again to see if it shows up.

Have you tried other discs as well to see if maybe issue with the disc you may be trying to use?

Something recent?

Any changes that either happened or that you perhaps made to your computer around the time that the problem started; particularly any Software or Hardware that you installed or setup.

What OS?