I had this and none of the anti-virus nor malware programs worked. I went to bleepingcomputer.com and one of their volunteers walked me through a fix. It is a free service, but the individual volunteers accept donations.
Google redirect is a nasty little bugger. Very hard to remove. But these guys did it without having to resort to more extreme measures. It was really quite easy and painless, though it took a couple of days of going back and forth for it to get done.