Windows IE all messed up

I am using Internet Explorer v6 with all the MS updates. My problem is that this "iSearch" toolbar suddenly showed up, and I can't remove it because it has greyed out all the boxes for toolbars. When I go to View-->Toolbars, all the choices are greyed out including the Standard Button, Address Bar and Links choices. It has been like this for awhile, but just now the whole setup of the bars has crammed into one row with a small address bar and not enough room to display all the functions. How can I regain control of my IE. P.S. I have and use Norton Antivirus Corporate version 8 and it has not detected any viral activity. Let me know my options here. Thanks.