Code 41 cd not working

Try this

1. Go to your Start menu and click “Run…”
2. In the Run box that opens, type “regedit” and press Enter.
3. In the new window that opens, navigate the tree in the left pane until you are at:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\
Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
4. In the right pane of the window, you should see an “UpperFilters” key.
5. Right-click the “UpperFilters” key an select “Delete”. Respond “Yes” to the confirmation prompt.
6. You should also see a “LowerFilters” key in the right pane.
7. Delete the ”LowerFilters” key.
8. Restart your computer.