Norton Family Notification : Non-supported Microsoft Edge browser launched

Bought my son a new laptop for his birthday.  Like all computers these days it's Windows 10.  I have tried to switch off the Edge browser, or at least hide all links to it but Cortana always launches Edge.

Each time my son uses his computer I get the following alert:

"Limitations in Windows 10 prevent Norton Family from monitoring your child's activities when using Microsoft Edge."

I'm advised to tell my child to use another supported browser.  Well, windows makes it too easy for them to use unsupported Edge and besides that he knows this gets him around Norton Family so he can visit any site he chooses.  What's the point of Norton Family?

When is this going to be fixed??