I'm using Google Chrome on a Windows 7 computer, and I've noticed that when searching for something by just typing in the address bar, it now returns a search results page from something called 'chatzum', where it used to return a google search results page. I've checked my settings, and google is still my default search provider, so why am I getting this chatzum search results page?

I assume it's some kind of virus, but I haven't been able to find anything that will get rid of it. Does anyone have any suggestions?