Norton Security Toolbar : 2015.5.4.11 does not stay enabled

Using Chrome the Norton Toolbar does not stay enabled.
Everytime I open the browser I have to go to extensions and keep enabling it. Unless I do this the Web Safe Icons will not appear either.

Everyday I get the following popup messages even though the toolbar is already installed:

Chrome Protection Alert
The Norton Extensions are not enabled 
I then click on INSTALL NOW

Then the next message comes up:
Secure your browser with Norton extensions
I then click on Norton Security Toolbar - CLICK TO ADD
Then click on Add Extension from the popup

Then if I refresh the browser the toolbar and Web Safe Icons appear. But if I close the browser and reopen it I have the same problem all over again.

I have tried uninstalling Norton and reinstalling it but it is still the same.

Anyone know why I have to keep going into extensions to enable the toolbar everytime I open the browser?
It doesn't happen in IE

It only started happening on the recent update

All help much appreciated