Download the free version of free SAS, http://www.superantispyware.com/superantispywarefreevspro.html , then update. Check in programs and features for any unfamiliar tool bars etc. and remove. Check chrome's extentions and remove anything unfamiliar. Reboot to safe mode and run a full scan of SAS and delete what it finds. In normal mode open Chrome again to see if ok.
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