what firewall? Try disabling it and see if you can run live update.
Also if you uninstall nortons again try using nortons removal tool.
http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2005033108162039
Also if you uninstall nortons again try using nortons removal tool.
http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2005033108162039