When Norton 360 try to update "my LiveUpdate" it always fail and the message "LiveUpdate could not complete Error 5". Then when I check my Updates history i can see which items Failed...
Start by contacting Norton Support & get N360 straightened out first.
Note: ALL of the WIndows Updates you cited are Optional, non-security updates (yes, even though they're
Important updates). Feel free to hide them & move on with your life.
• How to Hide or Unhide a Windows Update in Vista
http://www.vistax64.com/tutorials/72491-windows-update.html