1) in IE, go to tools, internet options , select the connections tab, then click on LAN settings, now uncheck everything in there, everything!!
(unless you know you user proxies.)
2) Go to control panel, select network connections, select the local area connection icon and double click on it. Now find internet protocol IP/TCP in the box and double click on it. Make sure the radio buttons saying " Obtain an ip address automatically are selected. both of them. (of course this is assuming u use dhcp, if u use static ip addresses, then make sure the dns server address is correct for what u use.
these are the two places I have found that rogue spyware change addresses to redirect you.
Also possible that they have changed url in the registry too.