In tip 10775 ยป How can I block the installation of Internet Explorer 7.0 using the registry?, we used a script to block installation on a list of computers.

You can download Microsoft's IE7BlockerToolkit.EXE, which contains a script to block, or unblock, a single computer, an .ADM file to prevent the installation of Internet Explorer 7.0 via Automatic Updates by using group policy, and a IE70BlockerHelp.htm file of instructions.