The purpose of Internet Explorer Compatibility Test Tool
Hello,
The Internet Explorer Compatibility test tool agrees you to test existing Web sites to decide if they have a compatibility problem that adversely affect how they will display on Internet Explorer 8, the version of Internet Explorer that shipped with Windows 7.
As many organizations have business-critical Web applications on their intranet, it is as important to resolve compatibility problems with Web applications as it is to resolve compatibility issues with more traditional applications.
To use Internet Explorer Compatibility Test Tool, open the tool from the Developer and Tester Tools' menu the Microsoft Application Compatibility Toolkit folder on the Start menu, click Enable, and then open Internet Explorer.
Thank You,
John Major.