Norton 360 use with Windows Vista OS

I installed Norton 360 on my PC within the last 24 hours - prior to that ran Windows Security Essentials with no operational issues. Using Google Chrome to access internet

Since N360 activation on 10/11/15, I am unable to keep Vista running - it shuts down every 5-15 minutes by itself and forces me to restart entire system. This is quite annoying...any ideas?