Win10 on Dell Inspiron Desktop PC

I want to play music from my Samsung Galaxy S6 through the bluetooth speaker system on my PC. After successfully pairing the phone, I discover that it is not connected. The bluetooth speakers are connected, but the phone only shows as "paired". In the Bluetooth popup, "allow a device to connect" is greyed out. After a Google search, I know this is a common problem, but proposed solutions don't work in my case. I tried rebooting both PC and phone, but no help. I installed the latest Bluetooth driver from Intel, but no change.

Any suggestions will be appreciated.