Task Scheduler Error

did it run ok before?
has anything been changed, or updated- soft or hardware wise?

I posted a similar question a few minutes ago.  All of the info I've found so far describes how to clean it up (delete the registry keys corresponding to the corrupted tasks, then recreate them).  I'm trying to sort out how the corruption occurs.  I've seen it on too many computers (about 10 so far, three different unrelated sites) to think it some obscure problem.

I received this very helpful link to my request:
https://archive.codeplex.com/?p=repairtasks

What is very handy about it is that it has a couple of links, one to Microsoft: https://support.microsoft.com/en-gb/help/2305420/ms10-092-vulnerability-in-task-scheduler-could-allow-for-elevation-of that describes how to fix the problem WITH keeping your scheduled tasks.  All the rest I saw had you just delete them.

The other link: https://gallery.technet.microsoft.com/scriptcenter/Repair-CorruptedTampered-c8d2e975 has a script to automate the process.

I've not tried either yet, will do when I see the problem again.