LU1803: LiveUpdate failed while getting your updates

This message appears when I try and do LiveUpdate.  When I go to Symantec it says to use the AutoFix Tool to first delete the LiveUpdate Folder and then to reload Live Update on my computer.  When I use the tool, it opens a window.  The tool says  "In the Internet Explorer Security Warning window, click Install.".  I do not get a window with this option.  My standalone computer operating system is Windows Vista Home Edition.