Can't uninstall or repair Bluetooth driver on Dell Latitude E6540

I have a Dell Latitude E6540, Windows 7 Pro SP1; installed programs list includes "Intel(R) PROSet/Wireless Software for Bluetooth(R) Technology". If I right-click on that in Control Panel / Programs and Features, I get options for "Change" and "Repair". If I choose "Repair", it operates for a couple of minutes, then tells me that "Bluetooth Device Monitor failed to start"; it suggests I ensure that I have sufficient privilege to start system services (which I do; I run out of an admin account all the time on this machine). It then notifies me it is "backing out" of the installation, and informs me that it did not complete successfully.

If I select the option for "Repair", it asks me if I want this program to make changes to the computer, I select yes, it operates for a while and then gives the same message.

If I go to Services and attempt to start the Bluetooth monitor manually, it says that it failed to respond in a timely manner.

I tried running a Dell install of a Bluetooth driver set; it failed, saying (in its log file) that it found an existing product.

When I attempt to use my Bluetooth headset, it pairs and shows up under Bluetooth devices, but I don't get Audio on it.

Is there some way I can get rid of the non-working Bluetooth driver on my machine and install a working one?

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