1. Click the 'Start' button, click the 'Run' option and then type 'regedit' and click the 'OK' button.
2. Use the navigation pane on the left side of the window to navigate to the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

3. Select the 'UpperFilters' key in the right side of the window, then click the 'Edit' button and then click the 'Delete' option. Click 'Yes' to confirm the deletion.
4. Click the 'LowerFilters' key, then select the 'Edit' button and choose the 'Delete' option again. Click 'Yes' to confirm the deletion.
5. Close the Registry Editor window and restart the computer to finish applying the settings that should fix the Code 19 error.