The controlpanelhelp.html file contains active links to external urls.
When you click on the link you get an error message.

To test fix:
1. Bring up the Java Plug-in Control Panel.
2. Click on the Help button.
3. In the Help window check that all the active links do not
go to a external URL.
4. Some of the links have been changed to text, so that the user
can see the URL and go to it later in a browser session.