See the links below about others with your problem.. It looks like if you set the scan for tracking cookies to "Ignore", the error goes away but doing so is definitely a "work around" not a fix. No trued fixes that I can see EXCEPT to uninstall Norton and use a different antivirus program:
There's a long thread at this Norton link about it:
Hope this helps.
Windows Host Process Rundll32 Stopped Working
Running Windows Vista Sp1 On Hp Elite m9250f.
I Keep Getting This Notice When Trying To Run Norton At The Start Of Run Scan,
Comes Up Twice And Stalls Norton Till I Clear It Two Or Three Times.