How to reconnect to a already paired bluetooth A2DP headset?

I found a work around. All you have to do is turn off the bluetooth adaptor by right clicking bluetooth icon on system tray and turn is on back. If your headset is available the computer will connect to it. (make sure one slot is available on your headset, i.e if your headset supports two devices simultaneously, make sure you dont have two devices connected to it already.) Worked for me, hope this works for you too.

Yep, and thanks. This is the only solution that works for me. It's a question of turning computer's adapter off, then on again every time I want to use my headset.

I would just like to say that you will never get the best Bluetooth functionality using Microsoft's Bluetooth stack. Microsoft releases a Bluetooth stack simply as basic support that is compatible with most devices and covers the most basic uses of Bluetooth hardware. It wasn't until Windows 7 that Microsoft even added native support for A2DP, and I found it lacking as it would not work properly without installing my device manufacturer's drivers.

What it comes down to is that if you want to use your Bluetooth adapter and devices properly you have to install the drivers from your manufacturer. This is doubly true if you are using a built-in laptop Bluetooth adapter. Every device manufacturer understands that Microsoft does not release the best Bluetooth stack and that it should only be used for basic needs. They will often have, at the very least as a download on their drivers page, an installer for Widcomm or Blusoleil drivers that are supported by your device.

Blusoleil probably has the best features of all the Bluetooth stacks, but it is very customized and a lot of people have issues properly installing this stack or do not like its menus. Sometimes it comes as a trial from your Bluetooth manufacturer (in some of the cheap Bluetooth dongles) and you have to buy the stack yourself. It isn't especially cheap, but it's not ridiculous like it once was.

Widcomm are the best known drivers, and they provide the best functionality and integrate into the operating system as best they can. Using this stack will be almost identical to using Microsoft's stack but it will increase performance and hardware functionality. Widcomm was originally a single company, but it has since been purchased by Broadcom and is now a division of Broadcom.

If your device does not come with a bluetooth stack for your operating system and does not provide one for download on their website you either purchased a cheap dongle or from a bad company. I suggest actually investing in a dongle that works properly. If you have a built-in adapter, there will be drivers for you online. If you have an older computer that you have updated to windows 7 yourself or in which the drivers are not doing what you need, find the version of drivers you are using and then search for newer ones on Google. Often HP releases updated drivers but does not put them in the download list for your computer because that specific computer came out during Windows Vista, or something of that sort. I know the drivers for the "HP Integrated Bluetooth" are typically version C or D in your downloads section, but I believe they are currently on at least E, maybe even up to H. These drivers are typically backwards compatible with your older device.

I also wasted a lot of time trying to figure out how to connect to an already paired bluetooth gadget.  The solution was to make sure that it was not connected to any other device, including the Windows7 computer I wanted to reconnect it to.

If the bluetooth gadget hasn't been turned off or reset since the last time since it was connected to your Windows7 computer, it may be remembering the old connection.  To fix that, turn the gadget off.  That should wipe the connection to other devices too.  If you've got a headset, you might need to pull the battery.

Connecting and disconnecting can be done on Windows 7 with a couple clicks.  Here's what works for me:

1. Pair your bluetooth gadget.
2. Click on the Bluetooth icon in the system tray (Bluetooth must be

turned on.  If it is and the Bluetooth icon isn't there, restore it

following instructions).

3. Click on "show bluetooth devices"
4. In the popup window , click on the icon of the Bluetooth gadget you

want to connect/disconnect.

5. In the next popup, you'll see a connect button if you are connected;

or a disconnect button if you aren't.

6. Pin this popup to the taskbar.
7. Now, to connect:
8. If some device is already connected to your bluetooth gadget,

you must disconnect that device first.

2. Then, click on the bluetooth icon you've added to the taskbar.
3. And, click the popup's connect button.  Your device should

connect.

8. Before connecting some other device to your bluetooth gadget:
9. Click on the bluetooth icon you've added to the taskbar
10. Click the popup's disconnect button.
11. Then, you can connect your other device

In the future, then it should be necessary only to remember to disconnect the gadget before connecting it to a new device.

Hope this helps,

Scott