How to stop process from .BAT file?

Question

So I have process I started from one bat file. How to stop it from another?

Answer 1

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

Answer 2

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.