Live Update query

Please bear in mind my illiteracy regarding matters affecting my pc.  I can follow clear instructions (usually) and today I turned on my pc to get an error message 3048,3.  Okay, I thought , just go into my Norton and follow instructions which did seem fairly clear when I read them.  But I failed at the first hurdle, i.e. to open Live Update.  The only Live Update I can find tells me that it is up to date and it won't let me click on anything.  I can see that my set-up shows I have Automatic Live Update but if that is the case why did I get an error message, the resolution of which required me to run Live Update message.

Am I making any sense?  Can anyone advise?  Thank you.

Annieliz