IE8 Blocker Tookkit 1 is a free tool that Microsoft has recently released to prevent your desktop from carrying out updates on the Internet Explorer 8 automatically prior to the completion of the compatibility testing. Installing the IE Blocker Toolkit 1 means that it will not install any update without obtaining your consent. There are two methods of configuring the toolkit including registry file and Group Policy. Internet Explorer 8 will no longer appear on the list of important updates if you configure it to stop users from installing it through Windows Update or WU/AU, The toolkit only block automatic updates from IE8 so manual installation of the IE 8 is still possible.
IE Blocker Toolkit features 2 important components. The first component, blocker script, uses the registry key and other values to prevent the updates of Internet Explorer 8 from taking place on your computer. The second component, Group Policy Administrative Template, is a .ADM file. The function of the Group Policy Administrative Template is for use in import new settings from Group Policy. To use the Group Policy settings, make sure the Only show policy settings can be fully managed option is unchecked. You can find this option by going to Administrative Templates > View > Filtering. If you want to unblock Internet Explorer 8, make sure you disable the Group Policy.
You need to install the IE8 Blocker Toolkit even if you have previous versions installed. For example, the IE7 Blocker Toolkit is only for blocking the delivery of Internet Explorer 7 and not Internet Explorer 8. The reason is because the difference in the registry keys that are used in blocking the Internet Explorer 7 and Internet Explorer 8. There is no expiration date in the IE7 Blocker Toolkit 1 so you can use it as long as you want.
Download link: https://www.microsoft.com/en-us/download/details.aspx?id=14149