SO i've had this exact same issue for months on a dell xps laptop. I used the fix mentioned above to edit the registry but this did not fix the issue and- as others have already mentioned- just meant I had no option to turn memory integrity on as for some reason it thinks i'm not the administrator, even though I am administrator and its my home laptop.
Cant believe such an issue has been carrying on for so many months. I thought a company such a <icrosoft would patch this out quickly. Very disappointing.
Are Microsoft working on a fix?? makes me want to switch to a mac which i never thought I would say...