Remember what you asked?
"pair my LG Tone headset with my usb adapter?"
That's not possible as the pairing is done with a PC that hosts said adapter and in Bluetooth we don't pair with an adapter but with the PC and windows with the adapter all setup and installed.
It sounds like the PC needs help. So go to your PC support and ask for them to get the adapter installed.
And in parting, I find it easier to use the under 5 buck Bluetooth adapters that just work with Windows XP Sp3 to 7 without a driver CD. Example at http://www.amazon.com/Bluetooth-USB-Micro-Adapter-Dongle/dp/B001EBE1LI (under 2 bucks).
Makes you wonder why folk struggle with drivers. And yes, that's the one I've used too many times.
I just bought a LG Tone HBS730 headset and a Medialink V4 Class 2 Bluetooth USB adapter.
I was able to succesfully pair the headset with my Galaxy S3 but I wasn't able to pair it with the usb adapter.
When I try load the driver from the cd for the usb adapter it's not able to find my headset. It reads something like "Installation cancelled. Can not find installed bluetooth device." I also tried again after putting the headset in standby multipoint mode by holding the call button while switching it on. There isn't any means to plug the headset into the computer or drivers I can install before hand.