System Specs :
intel 920, 6gb 1800mhz ram, Windows 7 x64, 4890 graphics card, evga x58 mirco mobo,
---------!-----------Targus ACB10US bluetooth adapter------------!---------,
M$ stack - works out of box
Using SVN build 5251
Genuine remote, straight from Target with nunchuck and wiimotion plus (motion plus not plugged in).
Bluetooth adapter off the shelf at Target => $20
Initially I had the exact same problems as OP. I tried installing 6 different versions of Bluesoleil as well and the only one that worked was the latest version, which is not free. With a little patience, I managed to get my setup to work straight out of the box, but is a little finicky. Here's how I got it to work:
1.) Make sure "auto-reconnect is checked" then click "pair up w/ wiimote"
2.) immediately after, push 1&2 on wiimote.
windows 7 should say "Bluetooth HID device found" and proceed to install drivers and search for updates online.
3.) About every 2 seconds I push "refresh wiimote" until it vibrates in my hands
4.) Upon successful install of drivers, I simply hit close and load up a wii game.
The wiimote automatically lights up the 1 position LED and works just fine.
The "finicky" element comes in having to time your PC so that your wiimote doesn't shut off before it finishes installing drivers. You can configure your PC to not search online for updates (i'd post how, but can't remember exactly, just google) each time you connect a device. That will speed up sync time.
"Recording" section displays no results (except I saw "battery" light up to full once when I first installed it, haven't seen it since). But the wiimote and nunchuck both function properly in every game.
If all else fails, it may just be a compatibility issue you're having. Check this link to see if your device is listed here.
Bluetooth Device List
If not, and problems still persist, you can try:
Amazon bluetooth 47cents plus 3$ for shipping (takes a little over a week)
Dealextreme bluetooth 2$, free shipping (from hong kong though, so it'll be 3 weeks).
I have also trolled many forums and many claim both of these also work right out of the box w/ windows 7. But I can guarantee the Targus one works
Hope this helps