Ok to edit task's xml file in c:\windows\system32\Tasks?

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http://serverfault.com – I wrote a PowerShell script that check the executable in the < action > tag for each task in the Task directory and mark the < enabled >TRUEorFALSE< / enabled > tag as false/true depending on the validity of the digital signature of the executable. After reading each task, the script re-saves the task file with the same name, type and location. Now my issue is that I get this message when I lunch task scheduler: “Task XYZ: The task image is corrupt or has been tampered with.” This message appears for all the tasks that were scanned and saved. Does editing task’s xml file dir (HowTos)