Show shut-down message as Windows 8 shuts down.

I have a PC that servers as an Update Server for an AV program and so should never normally be shut down (except temporarily if required for an install, repair, etc.  In order to help prevent someone unaware of this from shutting down the computer (thinking they are saving electricity, etc.) I would like a pop-up message to appear if a user shuts down the computer, reminding them that it should be restarted ASAP.  Ideally it would present an option to continue to shut down or cancel the shutdown, but I would be OK with a message that just appears for a short while as the computer shuts down, as a reminder.
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EirmanChief Operations ManagerCommented:
Use a utility such as this to lock the computer

Set the Chris PC screenlock image to a jpeg with an informative message (Set it to lock after say, 5 minutes).
Set the regular pc screensaver to something greater than 5 minutes.

When the PC is locked, mouse movements are ignored .... use the keyboard to bring up the password interface.

Finally, put a post-it note over the power button.
This machine should not even be used by anyone but admins - why do people service it that are not aware of its update server role? Sounds funny. If you didn't do it already, change the local security policy so that only administrators may shut it down.
Besides that, lock it away in the server room where only the allowed people have physical access.
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twizncAuthor Commented:
Neglected to respond to replies (sorry).  Eirman's solution looked promising, but when I clicked the link I got a warning that the site may be dangerous and had been reported as potentially infecting computers with malware.  Other replies did not really address my issue.
I addressed your issue, maybe not the way you hoped for, but I addressed it.
You could also use a shutdown script that displays a message before shutdown, like this two liner:
msg * This system must not be down, make sure to restart it!
timeout 10

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Guy Hengel [angelIII / a3]Billing EngineerCommented:
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
I agree.  McKnife's followup successfully addressed my issue.  Belated thanks, McKnife.
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