Anti.
1. Click on START button on taskbar.
2. Then go PROGRAMS and across to Norton Antivirus.
3. Then go across to LiveUPdate-NortonAntivirus. Click on it.
4. Ensure the dialogue box has INTERNET as your conection.
If it doesnt respond it usualy means either your server or Nortons is very busy. Cant say Ive ever had a problem with mine.