See http://word.mvps.org/FAQs/MacrosVBA/BanishWebToolbar.htm

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Graham Mayor - Word MVP
Web site www.gmayor.com
Word MVP web site www.mvps.org/word
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> I'm trying to find out how to get the Web built-in toolbar
> to quit appearing on my screen. I've gone in and
> unchecked it and then it will "magically" appear again
> later. When I go into toolbars, the check has reappeared.