Browser websearch redirect virus?

Okay so I have a very annoying issue D:! Whenever I do websearches in IE and FIrefox (latest versions of both) I get redirected to either a shopping site, virus removel site, or another search engine site. At one point SONAR indicated a few security risks and removed them but my issues then got worse. I was getting annoying toolbar popups, porn popping up on my desktop. I did a quick scan and updated my MalwareBytes and it removed all of those however I still get redirects occasionally.

 

Info:

Norton Internet Security 2010

Windows 7 Home Premium

MalwareBytes latest version

IE and Firefox latest versions

Firefox my primary browser