Hi, we have AT&T U-verse wireless internet and all of a sudden once of the computers connected to the internet dropped its connectivity. All of the other computers are still connected fine. I tried release/renew but it did not help. I have tried disconnecting and I have tried repairing, all without success. I have also tried unplugging/plugging the modem and reconnecting each computer one by one. Most of the computers connected fine, except for the one that is causing me problems. It is connected to my U-verse account but gives the error message "Limited or No Connectivity", and I can not get on the internet. It is a Gateway C-140X laptop, and it is running Windows XP. Any instructions would be appreciated. Thank you!