A conundrum with exec node and kill

General
2

Is this windows?

Perhaps it a similar situation where a child process is spawned & you need to send a negative PID (mentioned in a similar topic just recently regarding VLC)

In windows task manager I see...

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EDIT

tried minus pid - didnt kill sleep.exe on windows.
Also noted, windows generates a cmd.exe (thats the pid status shown) and a sleep.exe process. Even if you kill cmd.exe (in taskman), sleep.exe continues to run.

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