Brilliant! Solved my problem perfectly! After I had to reinstall my OS after a crash, my computer would not recognize the Broadcom Network Adapter for my Vostro 1400. This solution fixed my problem. I would never have thought of this myself. Thanks!
This solution didn't work for me. But I did back into a solution that did work. I went into the Device Manager. In the options for my wireless card I clicked "Disable Device". Then I clicked to "Enable Device". And then it began to work. For no known reason. So far so good!