Whereas if the service is stopped then click on the Start button for sure.Make sure to set Automatic for the Startup type.Now, double-click on it to open up the Properties window.Locate the Device Association Service from the list.Type services.msc and hit Enter > The Windows Services interface.First of all, open up the Run dialog box by pressing the Windows + R keys.If the Device Association Service isn’t running on the system then make sure to it on right now to fix the issue most probably.
It seems that the Windows service is responsible for pairing Bluetooth devices to your computer.
We should also mention removing other wireless (Bluetooth) devices from the PC and keep only the particular Bluetooth device that you’re facing the issue with. You can also run the Hardware & Devices troubleshooter if you want to ensure there are no hardware-related issues on your PC.Search for Troubleshoot and select it > Go to Bluetooth.Go to Windows Settings by pressing the Windows + I keys.Finally, restart your computer, and check for the issue again.Once done, click on Apply and then OK to save changes.If not turned on or the service is stopped (manual) then set it to Automatic and start the service too.Check whether the Bluetooth Support Service is turned on and set to Automatic or not by double-clicking on it.Input services.msc and hit Enter to open the Services window.Press the Windows + R keys to open the Run dialog box.