Norton 360 wont start after booting computer

After Norton 360 was working fine for years on my HP desktop computer (Win10 now), N360 will no longer run after booting up my computer.  If I select "Restart" from the start menu, the computer will reboot and then N360 will run.  I already tried removing it and re-installing it several times.  It will then work once or twice, but then revert to the situation I am in now.  How do I solve this?  Thank you.

-Scott