NIS 2013 Registry Entries Question

I have just updated my Norton Internet Security 2012 to 2013 (version 20.2.0.19)

 

I now find that my Windows XP Registry has the following registry entries that contain no data

 

HKEY_CLASSES_ROOT\NortonAntiVirus.MediaStatusSink
HKEY_CLASSES_ROOT\NortonAntiVirus.MediaStatusSink.1
HKEY_CLASSES_ROOT\Symantec.Norton.SystemStatus
HKEY_CLASSES_ROOT\Symantec.Norton.SystemStatus.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NortonAntiVirus.MediaStatusSink
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NortonAntiVirus.MediaStatusSink.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Symantec.Norton.SystemStatus
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Symantec.Norton.SystemStatus.1

 

Are these registry entries correct?, and as they contain no data can they be deleted?