I have a HP G6-2105 TX laptop. I upgraded it to windows 8. All drivers worked fine except the Bluetooth driver. I cannot detect any device through my laptop and no device sees my laptop. I installed the Broadcom drivers from official HP site. But that did not work either. Why is Bluetooth not working?
Make sure you have the right driver. Install it over, if needed.
Or maybe the website doesn't give Windows 8 compatible drivers, or the wrong one. Would be surprising and silly, but who knows. Try this, maybe: http://www.broadcom.com/
In last resort, you can try updating your drivers with software such as Driver Genius (which you can find here : http://www.driver-soft.com/ )
The most sad outcome would be if the device just isn't compatible with Windows 8 (yet?). I don't think it's the case, but again, who knows. You could email the manufacturer of your device to know.