Norton Product Tamper Protection - Alert - Question

Can anyone tell me what this is all about ?? 

 

Risk Level: Medium

Activity: Unauthorized access blocked (Open Process Token)

Status: Blocked

Actor: c:\windows\system32\ctfmon.exe

Action PID: 2816

Target: C:\Program Files\Norton Internet Security\Engine\16.1.0.33\MCUI32.exe

Target PID: 644

Action: Open Process Token

Reaction: Unauthorized access blocked