Situation:
able to connect to network but not to internet.
Fix attempts:
Rebooted
Ipconfig /release, ipconfig/flushdns, ipconfig/renew
Msconfig turned off all except networking
Safemode w/network
Ping 206.13.28.12 – ok
Ping yahoo.com – could not find host
Restored IE default settings
Checked permissions on computer, and domain controllers – ok
Used different computer with same login – successful
Used different computer at same connection – successful
Checked DNS settings – ok
Changed computers IP address
Unchecked automatically detect proxy server
Cleared all browsing cookies and files
Rolled back to Monday
Uninstalled IE, rebooted, installed IE8
Repaired Windows OS
Also attempted to use Firefox. Unable to connect to server.