1) Close all open programs
2) Click on Start, Run, and type REGEDIT and press Enter
3) Click on the plus signs (+) next to the following folders
4) This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand column.
5) If any of the above keys shown in step 4 are listed, right-click on them and choose Delete
6) After deleting the keys, close the Registry Editor
7) Reboot your computer
8) Open My Computer and check to see if your CD or DVD drives have returned. You may also want to open Device Manager and verify that the yellow exclamation and error code on the CD or DVD drive is gone.
**Warning, this requires editing your registry. Caution is required!**Modifying the registry can be dangerous (and can render your system unbootable) so it's advisable that you make a backup of the registry before proceeding.
Modification of the registry can be EXTREMELY dangerous if you do not know exactly what you are doing so follow the steps that are listed below EXACTLY. if you cannot perform some of these steps or if you have ANY questions please ask BEFORE proceeding.
Backing Up Your Registry
1. Go Here and download ERUNT
(ERUNT (Emergency Recovery Utility NT) is a free program that allows you to keep a complete backup of your registry and restore it when needed.)
2. Install ERUNT by following the prompts
(use the default install settings but say no to the portion that asks you to add ERUNT to the start-up folder, if you like you can enable this option later)
3. Start ERUNT
(either by double clicking on the desktop icon or choosing to start the program at the end of the setup)
4. Choose a location for the backup
(the default location is C:\WINDOWS\ERDNT which is acceptable).
5. Make sure that at least the first two check boxes are ticked
6. Press OK
7. Press YES to create the folder.
For more information about modifying the registry, see this Microsoft article: http://support.microsoft.com/default.aspx/kb/256986