Unfortunatly, its hard to find what drivers are needed withought knowing make, m/n or a s/n of the device, i had the same problem with my mp3 player.
He said he is on XP, so i would of thought the Device would of been plug and play.., but then i remember, my bluetooth dongle came with a driver cd, but did never say anything like The device is not recognised.
if you check with [link=http://support.microsoft.com/kb/841803]Microsoft[/link], you will find a big list of bluetooth radio drivers, which are included in XP SP2...
I also dont think that if u need a driver to run that device......
Do you hear a sound of dong ding when u hook that USB bluetooth with ur computer? nd get that message, that your hardware is not installed properly..?? coz if thats the case then u will definately need drivers for it....
o dear lord help me !! .. when i was looking for a usbII driver, i found it .. damn it!! .. what it is about, since my friend have lost the bluetooth adapter cd he gave it to me since I'm a computer engineer - to be :d (that's true),and he thought good of me, but now, I'm letting him down :s