Bluetooth audio missing on Windows 8

I am going to bet that you should be using the 4.0 driver found here

http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS031999&rss=true

Reference: http://social.technet.microsoft.com/Forums/en-US/w8itprohardware/thread/5526e50f-11e6-4f06-bfd4-a06e29419521