did u check Device Manager to see if there is a hardware issue causing it? As mentioned above, multiple installations of the same adapter cause Windows to follow a similar naming scheme. I recall my own issue recently which was almost exactly the same as yours. I have USB Port 1 & 2, and my adapter was setup to use port 1, I plugged it into port 2 accidentally, and the result in Device Manager was 2 installations of my WiFi adapter. Windows named them "USB WiFi Adapter" & "USB WiFi Adapter 1". Just a thought....
EDIT:
I forgot to ask as well, did you check the Wireless Networks that might be saved in Windows? It would be found by opening Network & Sharing Center, and click the link in the top left corner, "Manage Wireless Networks". These are the things I would check first.
Edited by PiMPiN, 16 November 2012 - 03:22.