1. Start Registry Editor (Regedt32.exe). 
2. Locate the UpperFilters value under the following key in the registry: 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} 
3. On the Edit menu, click Delete, and then click OK. 
4. Locate the LowerFilters value under the same key in the registry: 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} 
5. On the Edit menu, click Delete, and then click OK. 
6. Quit Registry Editor.NOTE: After you remove the Upperfilters value and the Lowerfilters value, if you notice lost functionality in a particular program, such as CD recording software, you may need to reinstall that software. If the problem recurs, consult with the software vendor for assistance. 

7. Restart your computer.