Customer protect by PROCESS class for some process. But it can be killed by taskkill.
i.e: editres PROCESS c:\Windows\system32\notepad.exe owner(nobody) defacc(n) audit(f)
taskkill /pid [PID]
process/application can be terminated.
PROCESS class is protecting from specific API in reference guide:
But taskkill command does not use this API.
So, it cannot protected.
When you need to protect it, you register FILE or so to protect for execution program.