You have a Google Redirect rootkit infection and as these can be quite bad it is best to get an independent forum to help you.
Post a Hijackthis log on one of the following forums for expert advice. They will advise you on what is the best tool to use in this case.
Do not post Hijackthis logs here, we can't help you with those !
Post the logs at a specialist Forum:
Be sure to read all the sticky announcements/instructions at the top of each malware forum!