If the CD or DVD is not detected by your computer, this may be due to several reasons, Tumanual suggest you read this tutorial, where you'll find the causes and solutions to the problem.

Important This article contains information about modifying the registry. Before you edit the registry, make sure to back security of it and you know how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the article number below to view in Microsoft Knowledge Base:
256986 (http://support.microsoft.com/kb/256986/) Description of the Microsoft Windows Registry

Symptoms
After you remove Microsoft Digital Image of the computer, your computer does not detect the CD or DVD drive.

Cause
This problem is due to change some registry keys in the registry when you remove Digital Image.

Solution

To avoid this problem in Windows Vista, follow these steps:
1. Remove the registry entries modified. To do this, follow these steps:
- Click Start, click All Programs, click Accessories and then click Run.
- Type regedit and then click OK.

If you are prompted for an administrator password or confirmation, type the password or click Allow.
- In the navigation pane, locate and then click the following registry subkey:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass {4D36E965-E325-11CE-BFC1-08002BE10318}
- In the right pane, click UpperFilters.
- On the Edit menu, click Delete.
- When prompted to confirm the deletion, click Yes.
- In the right pane, click LowerFilters.
- On the Edit menu, click Delete.
- When prompted to confirm the deletion, click Yes.
- Exit the Registry Editor.
- Restart the computer.

Note If you notice a loss of functionality for example in a particular program that records software on CD after you remove the registry values ​​UpperFilters and LowerFilters, reinstall that software. If this problem occurs again, contact your software vendor for assistance.
2. Remove existing drivers. To do this, follow these steps:
- Click Start, and then click Control Panel.
- Click System and Maintenance, click System, and then click Device Manager.

If Control Panel is in Classic View, double-click System, and then click Device Manager.
If you are prompted for an administrator password or confirmation, type the password or click Allow.
- In Device Manager, expand DVD / CD-ROM, click the right mouse button on the device CD and DVD, and then click Uninstall.
- When asked to confirm that you want to remove the device, click OK.
- Restart your computer.

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