When you open device manager, do you have any bangs or did the Atheros driver install correctly?
If the driver installed correctly and you have no bangs in the DM, the wireless card is probably bad.
http://www.amazon.com/gp/product/B008IFXQFU/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
Computers are very strange animals. Sorry I don't have a good answer for you! They seem to have a mind of their own!ok thanks, will look into it. This doesn't make sense, why would win7 work to perfection and not the vista which was what this unit came with?