After updating to 20.1.1.2 computer will not start up

I just updated to the newest Norton IS 20.1.1.2  And the next morning my computer would not boot up.  It ran the recovery tool and finally botted back up. Today the same thing happened.  I ran the Resource and Performance monitor and it's saying that Security Center is not showing any Antivirus or Anitspyware software installed.  Norton is running but each day I've had to redownload the latest definitions.  Is there any way I can uninstall norton Internet security 20.1.1.2 and go back to Norton 2012 version.  Version 19? 

 

I'm having alot of problems and the only thing I've done is update norton.  I only go to cbs news so I know I'm not infected. I've run norton, malewarebytes, etc and all clean.