I'm back with the same problem. Explorer does not recognize the DVD drive even though the device manager says it is working properly. I thought I had cured it when I used my system repair disk that I made when I first got the computer. Prior to using it, I made a disk image using Windows backup app. What I didn't know was that it doesn't make a complete image of the C: drive but only of the operating system. Consequently, after using the system repair disk, I had to reinstall all my apps. Fortunately, I had backed up my user folders. I've tried using Windows troubleshooter and it didn't fix it. After using the system repair disk, it worked OK for a few days and then gradually got worse because initially, I could reboot and cure the problem, now I can't. Any suggestions?