You have to disable it from Policy catalog as mcAfee Agent> Product Improvement Program > My Default
Do it as System tree > (system Name) > Action > Agent > modify Policies on a single system
Same as my picture.
I can't disable it.
It enforced and can't uncheck, if I delete "My Default" it will switch to use "McAfee Default" and I can't delete that policy.
Click Edit Assignment and clone policy--> uncheck product improvement and apply that policy.
Thanks so much ,It's work!
It was not the same as your picture is.
You have to disable it going from Policy not from System tree which shown in your Picture.
the right way is edit from policy catalog but as well as Shahid said You have to clone it because we want to do it just through System Tree!
BTW I am Happy to see that your problem solved already.