I have the exact same problem as you do, and have yet to find a workable solution. I think the reference to the KB 940199 might be a red herring – maybe Microsoft throwing up their hands not knowing why the driver can’t be found and blindly directing users to that KB article…might be wrong though.
I have tried downloading a couple of bluetooth stacks widcomm 5.1 and widcomm 6.0, the Vista x64 Lenovo Bluetooth software, etc. They all install, and I can even pair it with my Microsoft Bluetooth Notebook Mouse 5000, but the mouse won’t work. I also get the unknown hardware stuff that I can’t find drivers for.
Bummer…everything else is looking soooo good.
Oh yeah, I’m installing this on a Thinkpad T61p laptop.
