If you already have a threshold that triggers an event when that occurs, then you can just add a new 'Command' destination that simply calls your batch file.
If you have to change directories, pls note that threshold command is run from \Configuration directory, so take that as your starting point. Or just copy the batch file into that location.
Also, if you don't need special permissions to run the script, you can use 'Prognosis' key to execute the command.
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