non-authorized access blocked

Hello,

I have checked the history of my Norton Security installation on a laptop and I can see severals entries classified as being medium where it says that non authorized access has been blocked (open the process token) or (access to thread data). The program triggering this situation is most of the time Explorer and the target is NS.exe. I have another occurrence where the trigger is Acer Care Center (accstd) with the same target (NS.exe).

I would like to know whether this is normal or not and what should I do about this situation?

Regards