Kill Windows process forcefully

Get process id:



Image Name                     PID Session Name        Session#    Mem Usage
========================= ======== ================ =========== ============
System Idle Process              0 Services                   0          4 K
System                           4 Services                   0      4,028 K
smss.exe                       308 Services                   0        332 K
csrss.exe                      440 Services                   0      2,580 K
wininit.exe                    516 Services                   0        688 K
services.exe                   612 Services                   0      4,728 K
Acrobat.exe                   5876 Console                    3     63,964 K
chrome.exe                    3668 Console                    3    128,464 K

Now, trying to kill Acrobat forcefully:
C:\Users\Joel>taskkill /PID 5876 /F
ERROR: The process with PID 5876 could not be terminated.
Reason: There is no running instance of the task.

Retrying with /T option (kill all child processes too):

C:\Windows\system32>taskkill /PID 5876 /T
SUCCESS: Sent termination signal to process with PID 4808, child of PID 7728.
ERROR: The process with PID 7728 (child process of PID 5876) could not be termin
Reason: This process can only be terminated forcefully (with /F option).
ERROR: The process with PID 5876 (child process of PID 1532) could not be termin
Reason: One or more child processes of this process were still running.


Now even though it showed an error, the process was terminated.