In case your redirection problem is a simple set of alterations to your Hosts File you might try this as a first step:
==download HostsXpert from http://www.funkytoad.com/content/view/13/31/
-click the top button Make Writable if it is available
-click Restore MS Hosts File button.
If instead you would like to clear your hosts file manually [C:\Windows\system32\drivers\etc\hosts] then apart from the helpful guff from M$ which may or may not exist in your hosts file, this should be the only [or bare minimum!!] entry:
127.0.0.1 localhost
Drag Hosts into an empty notepad, edit it and Save.
You may find that you are not able to save the changed/corrected file. This is because some security applications, possibly also various malware, will lock your Hosts file [make it read-only] as a protection. Lock/Unlock hosts exists in Zonealarm and Spybot S&D.
ZoneAlarm : look under firewall, advanced;
Spybot : click Tools, Hosts File, uncheck "Lock Hosts file read-only as protection against hijackers"
Or just...[but a Spybot setting may over-ride this command....] do this:
Go Start, run, type cmd ...and press Enter. Paste this line into the window at the prompt, press Enter, close the window and try to save the file again.
attrib -r -h -s %SystemRoot%\system32\drivers\etc\HOSTS
Now try to get MBAM.