T500 - Internet Wireless Adapter Not Detected

I am at a loss right now since I have never encountered a problem with a computer that I couldn't solve at all. On my T500 (2081CTO), I had an XP OS and everything was working fine (almost). I decided to install the original Vista that came with it and at the same time updated the BIOS to the latest version, I think 3.18, before I installed Visa Home Basic. After the install, there is no wireless adapter deteced. I can't get any internet without a cable. Here is everything I have tried already:
Install all Vista OS updates
Run Lenovo System Update
Install standalone Wireless drivers from Lenovo directly
Resintall the drivers
Physically remove, clean, and re-insert the wireless adapter
Check settings in BIOS to make sure all wireless devices are enabled
Disable and then re-enable wireless LAN/WiMax in BIOS
Clear CMOS
I don't know what else to do, besides some costly and time consuming options, like reinstalling XP instead, getting a new adapter, or paying someone to fix my own computer.
Here are some additional clues:
Under device manager, only Intel 82567LM Gigabit Network Controller is listed under "Network Adapters"
There is "Other devices" under which there is "Network Controller" with an excalamation mark. I have been unable to install the dirvers for it
Finally, I do not have Lenovo recovery disks and had to install Vista from a downloaded version online. At the end of the install is asked me to install drivers, which I thought sounded weird, and chose not to. If I have to pay $30 to get a replacment disk for something I already own, I'd rather buy Windows 7.
So this is my dilemma and I am not sure exactly where my problem is. I would appreciate any help or insight.

You probably just need to download & install the drivers for the WiFi card... (You probably also need the drivers for some other devices as well, such as AMT and Card Reader, IIRC) You can get them on the Lenovo Driver download page, http://support.lenovo.com - (Drivers & Downloads) just put your MT/M number (from a label on the bottom of the laptop) in the "QuickPath" Product selector... (If you can't find the MT/M just put T500 in.) Then look for Wireless LAN drivers... If you haven't already done so, I'd suggest getting a copy of the Windows 7 Pro Recovery discs for the laptop and THEN install the afore mentioned drivers... Feel free to send me an e-mail if you have further questions about this... Just remove the spaces, change ATsymbol to @  and change DOTsymbol to . mkingsmill ATsymbol gmail DOTsymbol com I will do my best to reply on the forum for all to see (thus helping others who may also be researching solutions to this issue)

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