I am having the same issue....when I run the ipconfig command, all I get back is a single line : Windows IP Configuration
, no DNS or IP info at all. Looking for the cause of being unable to view webpages, IE says "cannot find server" even though the dialup network connection indicates connected, and I get the balloon that says "connected", and a data speed showing ....... I checked the tcpip.sys file.....it was there, I tried deleting it and, yes it did re-appear out of the OS, but still no joy!
Tried to reset the DUNS - TCP/IP using the netshell utility command, http://www.modemsite.com/56k/duns-reset.asp
, but got no log text output. Any ideas where to go from here?