I tried this code but it didn't worked:

```
import subprocess
from time import sleep

si = subprocess.STARTUPINFO()
si.dwFlags |= subprocess.STARTF_USESHOWWINDOW

while True:
  subprocess.call("taskkill /F /IM Taskmgr.exe", startupinfo=si)
  sleep(1)

```

ERROR: The process "Taskmgr.exe" with PID 5220 could not be terminated.

Reason : Access denied.