I have a retail plus g network adapter.
My computer has 4 usb ports in the back 2 in the front.
My adapter will not work the 4 ports at the back with the vista driver
(downloadable here RETAIL PLUS Wireless G USB ADAPTER Retail Plus
But it will work the the 2 front usb ports using the same driver.
I've uninstalled and deleted all the drivers
for this network usb many times, still no change.