IE Search Assistant

Good Morning:
In our internet explorer, when you press the search button, we are getting an 'error on page'. If you go into the different toolbars, they work, but not the default search assistant...Last time this happened, we had disabled the internet search assistant tool. I fear we may have done this again, but for the life of me I cannot find where to fix this. I have looked in IE manage add-ons and is it not there. I have also looked in services.msc, but its not there either (I didn't think it would be there anyway, since it is an internet search, and not the computer)...Can anybody help me? thanks