Cannot Uninstall Internet Explorer 5 Compatibility Mode Feature

You may be unable to uninstall the Internet Explorer 5 Compatibility mode feature.

To work around this problem, uninstall Internet Explorer 5 to return to the previous version of Internet Explorer, and then install Internet Explorer 5 again.

For information about uninstalling Internet Explorer 5, please see the following article in the Microsoft Knowledge Base:
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.


To manually remove Internet Explorer 4.0 Compatibility Mode, follow these steps:

1. Delete the "Internet Explorer-4 Compatible" folder and its contents.
2. Use Registry Editor to delete the following registry key:
   HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Compatibility Mode
3. Delete the "Previous Internet Explorer Ver. 4" shortcut icon from the Internet Explorer folder on the Start menu.
4. Run the Internet Explorer 5.0 Repair Tool in Add/Remove Programs.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Uninstalling Internet Explorer 5 to return to the previous version of Internet Explorer removes the "Internet Explorer 4 - Compatibility Mode" folder. When you install Internet Explorer 5 using a typical installation, Compatibility mode is not installed.

For additional information about Compatibility mode, please see the following article in the Microsoft Knowledge Base: