content: Norton 360 Update/ upgrade issues 1-800-644-5716 The problems related to update or upgrade of Norton 360 may be due to several reasons. There could be very serious technical issues which can be related to your system or the problems related you to not terms own operations. You need to report the problem to Norton antivirus technical support team and get solutions because only given be able to provide the solution that will help you to update or upgrade your anti-virus.  http://www.antivirustechnicalhelp.com/norton-antivirus.html