The case of the missing CD Rom

A help desk call arose today, where the CD-Rom drive was detected in the BIOS, but not within Windows XP. Device manager showed error 39.

After attempting removing the device in device manager and re-installing did not work, it was time to dig out the registry hack.


In Registry Editor, expand My Computer, and then expand HKEY_LOCAL_MACHINE.
Expand SYSTEM, and then expand CurrentControlSet.
Expand Control, and then expand Class.
Under Class, click {4D36E965-E325-11CE-BFC1-08002BE10318}.
In the details pane of Registry Editor, on the right side, click UpperFilters if it exists and delete.
In the details pane of Registry Editor, on the right side, click LowerFilters if it exists and delete.

Re-starting the computer then revealed the CD-Rom. Please note, ensure your registry is backed up prior to editing it.

Apparently this can be caused by removal of some CD burning software