When you open the Manage Add-ons dialog box on the Tools menu in Microsoft Internet Explorer, some installed add-ons may not be listed. Therefore, for example, you may not be able to select an add-on that you want to disable.
This issue occurs because, during the installation of certain add-ons, a flag is set in the registry that prevents the add-on from being managed through the Manage Add-ons dialog box.
Download informationThe following file is available for download from the Microsoft Download Center:
Download the WindowsXP-KB888240-x86-ENU.exe package now.For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online servicesMicrosoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
File informationThe English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
25-Oct-2004 23:30 6.0.2900.2538 55,808 Extmgr.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 888240 - Last Review: Feb 15, 2017 - Revision: 3