Help! How can i get rid of Browser Hijacker "freeresultsguide.com" ?

[Demina]

My Browser (Safari) has been hijacked from "freeresultsguide.com". Now i get redirected on several web sites all the time. I checked the browser plugins. But there is nothing new installed. No add ons re visible. What can i do to remove this?

I copied the url of this Browser Hijacker: http://freeresultsguide.com/?dn=cpapublic.net&fp=P3v0Fapw%2FHvz5NEP%2FRpzPC7U%2FYSMZ2wYPu8vmSUJITH8Ltxm%2FaZarDZBNjCyfLpMiS9PbvA5dnSYpUsoJiZOKw%3D%3D&prvtof=%2BbReq1UHTkJ5h8aAGGUq6SsKNwpnNwKMd0SASqL1YOi2hR952OXYBosR9T8ggyRIAjZP6wGhR%2FJWjD%2BgMDFHbX2VM%2Fh7whBMUjJWHzKAcwc%3D&poru=cwMCdBl4mFtQwlZMhbjdTakHpGXaJWQjPe7XvrUGKdJuWGvkUhJgHz3%2BMEMGYOk%2Fk7RIhFN3H7aXID6K1JvzRJBx3W6TDe6Wb2TvFQ4%2FeAo%3D&cifr=1&

Im on an iMac. My system is Mavericks 10.9.2.

Ty for helping.  Demina