Symantec rarely admits that THEY have a problem. It is always your PC, or
some else's software. However, to blame Microsoft is a new one. Ddi they
say what Microsoft program or file was causing this behavior? A firewall
might be able to do this, or an anti-spyware program. Do you happen to use
those by Microsoft? If so, try almost any other brand (several free), and
then turn off the Microsoft ones.
Additionally, internet explorer setting might lock out part of the the
internet, if the security setting were too tight. Try restoring the
defaults, whihc is an option in the IE settings. I hope that you are using
IE6, and not IE7, which seems buggier.
You might try contacting Symantec again, and maybe you will get a more
knowledgeable service representative.
That said, Symnatec's Live Update is not all that reliable. Every year or
two the Live Update feature of my Norton installation fails to work, usually
just after an update to Norton that changed live update.
The fix is usually to find the latest version of the Live Update installer
on the Symantec website and re-install it. Then, sometimes one has to
manually "register" products with the live update service. The instructions
to do this are usually somewhere on the Symnatec website, under Live Update
problems. But, one needs to spend some time looking for the fix and info.
Searching the Symantec website for the text of the error message from Live
Update, such as LU1875, will usually get you there.
An alternative to live updates for Norton are manual updates. These are
listed weekly, or more often, on the Major Geeks website. Be sure to get
the right set, 2003-2007, or 2008. For example:
http://www.majorgeeks.com/Norton_Virus_Definitions_2003-07_d3995.html
Of course, this link simply points back to Symantec, but I find Major Geeks
better organized.