>>>Hi,
>>>
>>>I have a bluetooth device (headset) that I added to the Windows 7 Bluetooth devices. So obviously Windows "detected" this device when it was on. Now when I turn the headset on, I tried to listen to a youtube but no sound is sent to the headset. The headset actually works with iPhone. And to test it, I turned the bluetooth off on the iphone, just so it was be interfering. What do you suggest?
>>
>>It could be that the device is correctly connected, but you don't have your Windows Sound output set to be sent to it.
>>
>>Go into Control Panel...Sound and make sure your headset is selected as the output device.
>>
>>I believe headsets are also a special case - if Windows detects they are plugged in they could/might automatically get sound routed to them. That's an extra function you may want to check for and configure if available.
>
>You are on to something. When I go to the Sound window, I see the Headset as one of the playback devices. But it is grayed and has a red arrow pointing down. So I need to figure how to set it On.
>Thank you.
>
>UPDATE. I also noticed that on this grayed/disabled item on the Sound window, it says "Disconnected". So maybe the Bluetooth is not connected. But how to connect it is a big question.

Hmm, could be a red herring in your case. The generic name "Headset" is used to refer to a 1/8 inch audio output jack; if no headset is connected to that jack it's shown as down/not available.

If your Bluetooth headset is at all recent, and properly connected/installed to your computer I'd expect it to show up by name in Device Manager. Click on View...Devices by connection, then search for your audio controller. My system is shown in the attached image, it shows "Speakers (High Definition Audio Device)" is connected.

It should also show by name in Control Panel...Sound (not just the generic name as explained above).

In addition to making a physical network connection via Bluetooth, your headset may require software drivers to be installed on Windows.