If you removed CD Burning software, or for some other mystical reason, can not longer access your CD ROM's,
in most cases following registry keys needs to be deleted:

Locate and delete the UpperFilters and LowerFilters values under the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}