Its been awhile....
Acer Laptop. Windows vista.
I Updated drivers, used every tool i could find to check on it, uninstalled all firewall/anti-virus. When that did not work we Formatted the Laptop, Clean install using the recovery Drive. Updated windows, Updated Drivers, Tried older Drivers, Tried Beta drivers.
If i connect to wifi on my mac book pro, share to Ethernet, then plug it in to his it works. I tried it straight to the modem, Router, and took it home to my place to try it. Also tried it with 3 different NIC Cords.
We tried hard... He can not go online on the boat with out a NIC.... no wifi allowed there.