1. Click on Start, Run, and type REGEDIT and press Enter
2. Double Click on the folder next to the following folders
3. This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand side.
4. If any of the above keys shown in step 3 are listed, right-click on them and choose Delete
5. After deleting the keys, close the Registry Editor
6. Reboot your computer
7. Open My Computer and check to see if your CD or DVD drives have returned.