Hi,
I looked over those sites and though I found nothing specific, it did get me thinking and thinking that the problem had to do with my computer itself, I began looking at the Intel Bluetooth/Wireless software. Having nothing to lose, I first located the files and found downloads of these files on the Intel site. I then uninstalled all software having to do with Intel Bluetooth/Wireless software and reinstalled them.
The Bluetooth headset was installed again and now appears in the list of sound "playback devices" . In order to get the headset to work I have to left click on the Headset icon in the "Bluetooth devices" window and then click on "play music" in order to play music from my computer through the headset. I also notice that the "double green lines" between the headphone icon and the Dell icon is no longer there. This is probably the reason I must repeat the above procedure each time I turn off the headset and then turn it on again.
It is still not operating correctly but I have made progress.
Thanks