google search results hijacked

I am having a problem with my google search results.  When I click on a link, the page is redirected to something entirely differnet.  Most often, I end up on a web site that starts “qiwisearch.com”, but I’ve also been reidrected to “info.com” and “edmunds.com”.  I have Norton 360 that I bought this week to try to fix this problem, but Norton 360 didn’t change anything.  I have also run ParetoLogic’s SpyXoft software and it hasn’t resloved the problem either.  Can anyone give me suggestions.  Thanks.