Running multiple versions of Windows Internet Explorer, or portions of Windows Internet Explorer, on a single instance of Windows is an unlicensed and unsupported solution. We strongly discourage using any solution or service (hosted or on-premises) that repackages the executable components of Internet Explorer, or portions of those components, into a separate installation. If you try to reconfigure Windows so that it runs multiple versions of Internet Explorer from these kinds of packages on a single instance of Windows, your configuration will not be supported by Microsoft Customer Support Services.
This includes solutions that try to incorporate application-level virtualization to run multiple repackaged versions of Windows Internet Explorer on a single operating system instance.
Microsoft offers best practices, guidance, and tools to help customers migrate from Windows Internet Explorer 6 to Windows Internet Explorer 8. For more information, visit the following Microsoft websites: