Buggy Yahoo Toolbar Messed Up IE6 Autocomplete

After installing Yahoo Companion/Toolbar on my Win2K computer with IE6, the control + enter autocomplete that is supposed to add www and .com to the URL typed in the address bar doesn't work properly.

Sometimes it works, but if the text in the address is a Yahoo subdomain it goes there instead.

For instance if I type CNN then control+enter, it goes to www.cnn.com. but if I type news or weather +control+enter, it tries to take me to news.yahoo.com or weather.yahoo.com instead of the sites I wanted to go to (www.news.com and www.weather.com)

It is so messed up that, weather + control+enter goes to invalid URLs like http://www.http://weather.yahoo.com.

How can I get the IE6 Quickcomplete back to the default without uninstalling the Yahoo toolbar?