Norton Online Family Notification : Browser Plugin Disabled & Notice sometimes says Vista Controls

On my main desktop family PC, we have a huge issue with Norton family not working. It is a Win8.1 with 16gig ram and my sons account is a restricted user account.

Frequently I get emails saying Norton family was disabled. I also go this message few times when I log into my family account to see what it shows:

"We cannot monitor your child's activity with Vista Parental Controls installed."

I am fairly strong with PC's BUT do not really know where to start to fix this. I do know this has continued to happen for the last 3+ months and I need to fix it or replace norton because I am concerned about my protecting my children.

Your guidance and help is much appreciated!