How to stop process from .BAT file?

As TASKKILL might be unavailable on some Home/basic editions of windows here some alternatives:

TSKILL processName

or

TSKILL PID

Have on mind that processName should not have the .exe suffix and is limited to 18 characters.

Another option is WMIC :

wmic Path win32_process Where "Caption Like 'MyProcess.exe'" Call Terminate

wmic offer even more flexibility than taskkill .With wmic Path win32_process get you can see the available fileds you can filter.

To terminate a process you know the name of, try:

taskkill /IM notepad.exe

This will ask it to close, but it may refuse, offer to "save changes", etc. If you want to forcibly kill it, try:

taskkill /F /IM notepad.exe

When you start a process from a batch file, it starts as a separate process with no hint towards the batch file that started it (since this would have finished running in the meantime, things like the parent process ID won't help you).

If you know the process name, and it is unique among all running processes, you can use taskkill, like @IVlad suggests in a comment.

If it is not unique, you might want to look into jobs. These terminate all spawned child processes when they are terminated.

taskkill /F /IM notepad.exe this is the best way to kill the task from task manager.