Well I guess I am confused. I have never taken my Vostro 3500 apart but believe the BT is part of the system board. The BT light is lit on the icon panel directly above the function keys on the base. So at some level the computer thinks the BT is enabled, but Windows 10 does not give me access to is and does not display the driver, in a way I can identify. I do not want to spend more money on a unit what is four years old, nor would I know how to disable the current BT chips, as I can't find where it is supported in the OS.