I have a doctors office that has 18 XP Pro sp2 Dells that are in a workgroup configuration. They use the computers for medical research on the internet and email. They have a T-1 that goes through a linksys wireless router. Two of the computers lost the ablility to connect to the internet yesterday morning. Nothing has changed with our network and there were no power issues. Ipconfig /all shows that they are getting the right TCP/IP settings. I can see all computers and access all shares on the network, but these two computers will not go on the internet. I have tried othe profiles and they do not work either. Anti virus and spyware is clean. Any Ideas before I replace the NIc cards??