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#1
One can also download and run adwcleaner, however, be forewarned, go through all tabs and unclick what you know to be good, adwcleaner can be a little caustic. I'm not sure if ToolbarCleaner will help here.
That's a Chrome icon, isn't it? I don't use Chrome, so can't tell you if it's some option in that browser if you have it installed.