Cannot fix Norton AntiVirus Live Update

I keep getting a message every time I turn on the computer that there is exposure on Norton Antivirus in that I don't have the latest definitions.  (I have Professional Edition 2003.)  Some messages tell me to run Live Update.  So I run Live Update and I keep getting the following message:

 

         The following updates have been aborted:

         Norton AntiVirus Virus Definitions has 1 aborted update(s).

         Reason:  LU1875: This update failed during its preprocessing welcome text phase.

I tried to have the technical help on the Norton website help fix it but as it runs I keep getting the Windows message that the program is not responding and needs to shut down.

Can anyone assist me here??  What is LU1875?  How can I fix this?

Thanks in advance to any and all who can help.