We have a group of machines running scripts. Most of our machines fail to finish the task after last weekend.

After comparing the working machines and non-workings machines we find out something weired that the behavior of Taskkill command has changed from non-blocking command into a blocking one on broken machines.

For example, to kill a process: taskkill /im notexist.exe /f, if the process 'notexist.exe' does not exist, command will return immediatelly on working machines but keep a 5s timeout before return on broken machines.

They share the same harware and os version and the 'taskkill.exe' version.

The blocking one:

The non-blocking one:

Is there anything in the registry matters? How could I make the behavior consistently?