Whenever I use the address bar to search for something in Google chrome it goes to yahoo despite the fact that In my Chrome options I have it set to Google. Has anyone else experienced something like this? Is there a way to fix it?

Try this:
http://support.google.com/chrome/bin/answer.py?hl=en&answer=95426

Run a spyware/adware program.

Cabius, some programs that you download off the internet will alter the search engine that your browser uses... Dun dun dun!

Keep an eye on the checkboxes when you're installing stuff you got off the net...

I do, I always always always uncheck the box that changes my search provider, I hate anything other than google.