Trouble with Wireless PCI

I couldn't find anything on the web, so I write it here.

I have a desktop that I just formatted and put Windows 7 64 bits in it. I bought this computer in August 2009. The trouble is, my wireless PCI doesn't work anymore. I bought another one that was for sure compatible with 7, and still doesn't work. I updated the drivers many times, I updated the drivers of the motherboard, I took the adapter out and in a few times... I dunno what to do anymore...

Can anyone help me?

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