Here's another fun one...

Machine in question is a Win2K Pro. NE2000 NIC. RASPPPoE Dialer.

Machine connects to Sympatico DSL, authenticates OK, gets IP address etc.

Machine can see,talk to and be talked to other machines on LAN.

Machine can ping (using CMD prompt) "most" (I say most because there are a few that we have found that do not get replies, microsoft.com being one that couldn't be reached.) address on the WWW.

Browser and E-Mail cannot connect... just keep getting DNS error.

Have tried reinstalling DUN and Network components... (This used to work a week ago.) Have run "ipconfig /flushdns"