Windows 7 bluetooth audio suddenly not working after Windows update
Windows 7 64 bits Bluetooth audio worked fine but suddenly not working after Windows update on June / July 2016.
The listen to music is not clickable in Devices and printers
This is intel compatibility issue on Microsoft KB 3161608/3172605 updates on June / July 2016. More information please check this link
New intel PROset/bluetooth driver
Credit to: Aur Saraf's comment from this question