Driver needed to run Sony Bluetooth speaker

The bluetooth "dongle" market is a very complicated one and is full of a lot of low quality products which are often not supported, you could, ( if you can discover the information because your hardware is from a major manufacturer ), try contacting the dongle manufacturer, but these are often small 3rd world or far east companies, that appear and disappear overnight. The additional software the dongle is looking for could easily be something from a long gone affiliate of the hardware manufacturer, as it was normal for these devices to use free libraries of functions, which are no longer available.

there is a company called BlueSoleil, the most easy-to-use, innovative and interoperable Bluetooth software, Bluetooth driver which is a major player in the blue tooth market (though not a driver only source) which my support your dongle though this may mean additional costs. best way would IMHO the return the dongle and purchase something from one of the major suppliers

Edit

The following is a list of the main chipset manufacturers for Bluetooth - if you can find out the name of the Chip in your device you may be able to obtain drivers direct from one of these companies although some do not deal direct with the public it may be worth a try ( search for the company support site as the links are email addresses of sales contacts)

End Product Manufacturer | Bluetooth Technology Website

Hi and welcome to SevenForums,
Well Sony is a large company and is the brand but Blue tooth devices is one of the things KB3172605 may have killed
The known issues of it killing blue tooth devices was removed when the new version was released this month
The fix was supposed to be issued by Intel.

So you might check and see if KB3172605 is installed
If it is create a system image before removing to test.

Most devices come with a software disk which would have the driver on it is that where you ran setup from ?