IE Content Advisor Too Restrictive

When I 'Enable' “Content Advisor” in IE8 and restrict just porn sites.... EVERY website I try to visit -- even MSN. com, Yahoo, and others that ought to be safe -- indicate restricted content and I have to keep putting in my password just to go there! The same thing happens with EVERY word I place in a 'search engine.' I need to enter my password before the search will begin.

If I check the box for “Users can see websites that have no rating” then I might as well not even use 'Content Advisor'... because no site is restricted. Any help would be most appreciated.

hcrawfor