Posted 06 March 2012 - 08:27 PM
Dealing with one of these myself. Where does Google resolve? Open a command prompt and ping www.google.com. Does it try to go to 18.104.22.168? I believe this is the remnant of an old browser redirect, which is no longer functional. That's why Malwarebytes won't find it. You can repair XP's TCP/IP stack manually from a command prompt like this:
netsh interface ip reset
netsh winsock reset
Once you've done that it will require a reboot. If it works, great... but it may come back. If so, I suggest reinstalling XPSP3. If you try to do so and it fails, you have a much more serious system problem.
PS - If you're not comfortable with command prompt commands, from another machine search for "WinSockFix 22.214.171.124"... it's a free download.