Norton Online Family turned off

I just started using norton online family on our family PC. It has been very helpful and I have been able to view all activities of

my children.

 

However, I have a problem, I dun understand how this programme can be turn off. I recieved this email from Norton that

Norton has been turned off, how could my children do that when they do not have the password??? How can I

stop the pop up message asking them if they wish to turn off norton?

 

They are also able to log on the PC after the time I set, how is that so? I have set it to automatic shut down after certain time.

 

Can anyone help me, thanks.

 

 

Julie