How do I create a power request? (not override)  

Here's the deal.

For some reason, when I play Fallout 4 (only Fallout 4) if I leave pc idle long enough for my monitor to go to sleep, when it does the PC becomes totally unresponsive requiring a hard reset. I can still hear the game sounds.

The monitor used to sleep and wake normally if I left the game running. The system does not go to sleep while the game is running though.

I know how to create a "requestoverride" to prevent things from keeping the PC from sleeping (which I have none of) but how do I create a "request" to prevent the display from sleeping when the fallout4.exe process is running?

The possible cause of this issue may be the fact that I did not "install" the game. I had previously created a single archive of the entire game, files and folder structure, and I restored that back to it's original logical location.

The reason for doing this is the massive amount of modding I've done and continue to do to the game. When I have it all running with no problems, I make a backup. I may remove it for 6 months then come back and restore it and do another round of heavy modding and it's good to have a backup in case things go wrong, which they often do when running over 160 mods, using custom models and physics, and teaching yourself how to mod the game even deeper.

Windows 10 x64 Pro V1803 Build 17134.345

You could replace the shortcut you use to run the game with a shortcut to a batch file containing

Code:

:: Set sleep never
powercfg /change standby-timeout-ac 0
powercfg /change standby-timeout-dc 0
:: Run the game
Call {whatever is in your normal shortcut's properties to start the game}
:: Pause during testing to make sure this line is not reached until the game ends
:: Set sleep back to normal [I have used 1 min in this example]
powercfg /change standby-timeout-ac 1
powercfg /change standby-timeout-dc 1

You would have to test the batch file to make sure that the game behaved itself when started using Call [hence the remarked out line :: Pause during testing].
I have seen some things misbehave and unexpectedly pass control straight back to the batch file as soon as the Call command runs with the result that the final batch file commands are executed straightaway instead of after the game is closed. If this does happen you'd need to experiment with using a Start command instead of Call.

Notes
1 The batch file shortcut's icon would be visible on the Taskbar all the time the game is running. I suggest making the shortcut run minimised.
2 You could set the shortcut's icon to the same as that used for the game so you'd know what it was.

3.1 If you really hate the idea of the batch file's shortcut being on the Taskbar the whole time you could either use vbs instead of the batch file or use the vbs to call the batch file.
3.2 In both cases, you would write the vbs to run the individual powercfg commands / batch file in a hidden window [this would hide the individual powercfg commands / batch file but should not hide the game's window].
3.3 I find using vbs to run the whole batch file to be the easiest method but that is only because my vbs skills are so poor.

Code:

Set WshShell = CreateObject("WScript.Shell")
WshShell.Run chr(34) & "C:\Tools\StartTheGame\StartTheGame.bat" & Chr(34), 0

Best of luck,
Denis

I'm glad to have loaded your neurons.

Denis