Is there a trigger for a task schedule to shutdown

I want to ensure that when I shutdown certain critical files have been copied to an alternate location.
I have viewed a great number of tips and tutorials which show how to create a shutdown task.
eg
Shut Down Windows Alt+F4 Window - Change Default Action
Shut Down Computer Shortcut - Create
but fail to see how these are triggered.

Is it just changing the shutdown.exe to do the comparison of the files last written date/time, doing a copy if alternate location file is not the current file date/time?

You might be able to use Group Policy to run a shutdown script.
Here are a couple of MS technet articles about this:
https://technet.microsoft.com/en-us/.../cc753404.aspx
https://technet.microsoft.com/en-us/.../cc770300.aspx

I've never done this, so you would have to play with it to see if it can do what you want.

Here's an article that uses backup as an example:

Run Scripts At Shutdown in Windows 7

It sounds like you need confirmation that the files have copied; if you figure that out I'd sure love to see how you implemented it MacNala.

:)

Am I reading more into your reply than first appears?
Are you suggesting that there is Gotcha I should look out for?
e.g. The file stamps such lastwrittentime might not be up to date?..
I am going to attempt this in Powershell and if successful will report back.