I found this but there is no guarantee.
You could also try turning your PC off and cold boot it.
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}
Greeting MrReaL
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