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After you uninstall Internet Explorer 5.01 to return to your previous Internet Explorer 5.0 installation, the Microsoft Internet Explorer 5 and Internet Tools entry may be missing from the list of installed programs in the Add/Remove Programs tool.
This behavior can occur if the removal of Internet Explorer 5.01 removed the previous uninstallation information from the registry.
To work around this issue, reinstall Internet Explorer 5.0.
NOTE: You can also choose to repair Internet Explorer 5.0 without the user interface.
For additional information about uninstalling Internet Explorer 5.01, click the article number below to view the article in the Microsoft Knowledge Base:
This key provides the path information for the "Add a component" user interface. This key also provides the installation source path information and the location of the Windows Update Setup Files folder.