How do I get BlueTooth enabled on Windows again?

Question

I've dealt with this before--this is my third time (at least) instatlling a fresh copy of Windows 7 Ultimate via Bootcamp.
Basically I did all the normal steps: used Boot Camp Assistant to convert my Win7 iso into a WININSTALL thumbdrive, installed windows. Then I put the special apple utilities or whatever (the middle option in Boot Camp Assistant) and went and installed all those on Windows.
Now everything is pretty much working except BlueTooth. It simply isn't showing up in my taskbar or in my Control Panel.
Yes, I've already done the Device Manager -> Network Adapters -> Broadcom 802.11n Network Adapter -> Properties -> Advanced -> BlueTooth Collaboration -> Enable thing and that didn't change anything for me. My computer still thinks I don't have any bluetooth dongles or devices.
I'm on a mid 2012 MBA and I know it has bluetooth because 1) I've used it on the mac side of things and 2) I've used it on Windows previously.
I also remember having to jump through hoops when I wanted to initially activate it on Windows but I can't remember how I did that.... which is why I'm asking here.
(Clarification: Most people having BT issues seem to just not have great quality. I'm not getting BT AT ALL, as if it's not even attached to my system.)

Answer 1

Update: I forgot something about the way BootCamp installs Windows...
I had temporarily turned off BlueTooth on OS X because I didn't need it, and when you do that, it effectively removes it from the system's list of devices.
So I just wiped the Windows partition, turned BT back on in OS X, and re-installed Windows. Just to make sure, I went through and manually installed all the drivers by hand and then let the BootCamp utility install them as well, and it's been working like a charm!