Did you already try the Symantec site? They've got a faq, a good search functionality in their knowledge base, maybe a forum (I don't know for Symantec, but McAfee seems to have one), and of course - having bought their product - you're entitled for technical support (although it might not be free) if the help-yourself-method doesn't work.
It could be an error in one of their scripts, possibly of a kind that only crops up in the SP2-version of IE, depending on if it's a very old or a very recent version of the program. You certainly can't remedy that yourself.
Could someone please help.I have recently installed Norton Internet Security into Windows XP SP2,but when I try to configure it I get a script error message.Reads- Line: 262-Char: 3-Error:"Main Frame.m a Wizard Panels" is null or not an object.-ULR:res//C\Program%20Files\Norton%20Internet%20Security\CfgWzResdll/CfgWizRoadmap.htm. Any ideas would be much appreciated.