Error in Office Assistant

I have MS-Office installed in a Win-NT workstation, and when I've opened Word-2000 or Excel-2000 etc... and once inside if I need any help, I click HELP, pull-down menu, then select the first option "microsoft word help" incase of Word, to go to "office assistant" Now when here any key word I search and click to continue with the results, I get an error message "this page provides potentially unsafe information to an ActiveX control. Your current security settings probihit running controls in this manner. As a result this page may not display correctly" How do I rectify this?? This is not happening in other computers, so looks like there is a setup I'm missing in Internet Explorer under security settings??