Norton Antivirus updates failed to complete

Every time the Antivirus were out of date the failed error message appeared.

If the updates were unable to complete what I do is to restore factory settings so that the Antivirus would be updated. I don't want to do that every time the Antivirus runs out of date to do the factory settings as it's just a waste of time.
Do you guys know other techniques on how to update the Antivirus without the failure notice? I want the Antivirus to be updated immediately without any error occurring.
Please, do you have an advice regarding this problem?
Until now my Antivirus is not fixed.
Thank you.
