Norton 360 not updating error 5
Some other websites (and users who’ve found some solutions) note this error as happening due to hardware issues (faulty cable, faulty USB port, accidentally disconnect etc.)One of the first things you can try is to change the USB port where the cable connects.This is too basic, I know, but you’d be surprised at how randomly this fixes all hiccups when trying to upgrade/update the firmware.
In addition, users may unknowingly consent to the installation of spyware on their computer by accepting the license agreement to use unknown software. The hackers who practise it are simply identity thieves with IT expertise.
Apple’s support page lists error 9 as a possible security software issue.
This could be firewall blocking access to specific websites/web resources (like i Tunes trying to download something from Apple’s servers).
Having an antivirus program can certainly help to prevent an infection.
They even may be able to contain or sometimes fix your computer, should it become compromised.