When you open My Computer, after installing Windows XP, your CD-ROM, CD-ROM R/W, or DVD-ROM drive is missing? If you check Device Manager, there may be question marks on the devices listed under DVD/CD-ROM drives?

This behavior is symptomatic of having an incorrect device driver installed.

To fix the problem:

01. Use the Registry Editor to navigate to:

HKEY_LOCAL_MACHINE/System/CurretControlSet/Control/Class/\{4d36e965-e325-11ce-bfc1-08002be10318\}.

02. Export this key to a savekey.reg file.

03. If the UpperFilters and/or LowerFilters Value Names exists, Delete them.

04. Exit the Registry Editor.

05. Shutdown and restart Windows XP.

06. Control Panel / \[Performance and Maintenance\] / System.

07. Press Device Manager on the Hardware tab.

08. Select (highlight) the drive with the question mark.

09. Use the Action menu to Uninstall the device. Press OK when prompted to confirm.

10. Repeat steps 08 and 09 for any other drive that is listed with a question mark.

11. Use the Action menu to Scan for hardware changes.

NOTE: Check that the device is supported on the Hardware Compatibility List (HCL).

NOTE: You may need to obtain a Windows XP device driver from the drive manufacturer.