What wireless adapter are you using?
I am having the same problem. I have a dell insipron 9300. Hardware is detected and recognized. When trying to install the adapter drivers it states it cannot find a file. It does not tell me what file it is looking for. The Adapter is a WM3A2200BG. I have tried driverss from Dell and from Intel with same results. I lost the card after a virus attack, which I cleaned up. I also did a total uninstall and tried again.