Hi,
My problem now is that, in the Norton Anti Theft site, there isn't anymore the option to enable the
Intel Anti Theft feature.
Thinking it could be a problem of the Intel MEI (Management Engine Interface) I have done a reset of my laptop.
Now, using the testing tools, it seems that Intel MEI works without problem,
but as before, no "enable Intel Anti Theft" icon is present on the Norton Anti Theft page.