We have a client who is overseas and having difficulties using the internet because he is unable to resolve DNS names. He is able to both Ping and browse IP addresses. He is getting his IP address by DHCP. He was also receiving the DNS server by DHCP, I tested that he could ping it successfully, and then had him enter static DNS servers from OpenDNS anyways, still no success.
I have done flushdns, checked the contents of the hosts file, run the netsh reset, and had him run an AVG 8 antivirus scan which came up clean, and am out of ideas.