Microsoft will distribute Windows Internet Explorer 8 as a high-priority update through Automatic Updates for Windows XP Service Pack 2 and higher. To avoid this use the Blocker Toolkit. You can download the toolkit from Microsoft http://www.microsoft.com/downloads/details.aspx?familyid=21687628-5806-4ba6-9e4e-8e224ec6dd8c&displaylang=en&tm