Follow the procedure listed below to correct your registry:
1. Open Start >> Run, and type "regedit" (without double quotes), and click OK.
2. Locate UpperFilters registry value. it resides in the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E980-E325-11CE-BFC1-08002BE10318}
3. Click on Edit menu, and select Delete and click OK.
Note: If you receive an error when you try to delete the registry subkey, you may not have correct permissions to edit the subkey.
4. Locate LowerFilters registry value. It resides in the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}
5. Click on Edit menu, and select Delete and click OK.
6. Exit Registry Editor and restart your system.
selvaraj.s (who love sindhu), December 2008