Norton Vulnerability Protection Disabled

I have A toshiba laptop running Windows 8.

I had to uninstall and reinstall  NIS 21.5.0.19 because I received ERROR 3039,1 and Error 8506,421

After reinstall of NIS when I open Internet Explorer 10 and look under manage add-ons, Norton Vulnerability Protection is disabled. I enable it but when I close Internet Explorer and reopen it Norton Vulnerability is back to disabled.

Any Suggestions would be appreciated.