While doing the windows 8 upgrade i had this weird problem.. the installer wanted me to uninstall intel proset bluetooth drivers.. but the drivers refused to uninstall!
apparently its a common problem..
This is how I fixed it:
* Go to services.msc via RUN (Windows Key + R = Run Command Prompt)
* Stop these 3 services http://i.imgur.com/0QKnn.jpg
Bluetooth Device Monitor
Bluetooth Media Service
Bluetooth OBEX Service
* Delete the bluetooth folder located under http://i.imgur.com/mOChF.jpg
C:Program Files (x86)Intel
* Delete the services that are associated with them in cmd (run as administrator) with:
sc delete "Bluetooth Device Monitor"
sc delete "Bluetooth Media Service"
sc delete "Bluetooth OBEX Service"
That should do the trick, it worked for me at least!