How to close a software automatically when it's idle?

You would need to Google for some third party software to enable you to this. This is not possible with the Windows features.

I decided to play with this a bit.

You can still wait on a PowerShell solution if you don't want to install the free 3rd party app named AutoIt.


You can install AutoIt3 from here:
https://www.autoitscript.com/site/autoit/downloads/
Accept all of the defaults during the installation.

After the installation completes:
Right click on the desktop and select New > AutoIt v3 Script from the context menu.
(You might need to select the desktop and press F5 to get that context menu.)
Then right click on the newly created file and select Edit Script from the context menu.

Copy/paste the info below into the newly created file:
(You can paste over the info that is already in the new file.)

Code:

Opt("WinTitleMatchMode", 3) ;3 = exact title match
Opt("TrayIconDebug", 1)

$S_running = "check-4-app" ;name the script
If WinExists($S_running) Then Exit
AutoItWinSetTitle($S_running)

$title = "Untitled - Notepad"
$count = 0
While 1
    $state = WinGetState($title)
    $count += 1

    If $state = 15 Or $state = 47 Or $state = 0 Then $count = 0

    If $count > 10 Then WinClose($title)

    ToolTip("count = " & $count, 0, 0, "state = " & $state)
    Sleep(1000)
WEnd

Save that file.
Move it to the Startup folder.
Right click on the file and select Run Script from the context menu.

You can end the script by clicking on the AutoIt icon in the notification area down by the clock.

If you would rather not have an AutoIt icon in the notification area, add this line...
#NoTrayIcon
...as the first line of the script.
If you do that, then you can kill the script (if need be) via Task Manager.
Kill the process named AutoIt3.exe.


The script in the code box above is going to close the app after 6 seconds.
Change
If $count > 6 Then WinClose($title)
to
If $count > 600 Then WinClose($title)
to make it wait 10 minutes (600 seconds).

Change the text in this line to match the app that you want to close:
$title = "Untitled - Notepad"
The title needs to be an exact match.
If the title of the app to be closed changes a bit (like notepad's title changes once you save a file), then we can change the code to handle matching a part of the title.

If the app to be closed can get into a state where it will not close (like notepad with unsaved changes), then we can add code to deal with that. If need be, we can kill the app and lose the unsaved changes.

Hide the ToolTip that I used for debugging by adding a semicolon before that line as shown in the video





This part of the script just sets a name for the invisible window that the script will create:

Code:

$S_running = "check-4-app" ;name the script
If WinExists($S_running) Then Exit
AutoItWinSetTitle($S_running)

You can change "check-4-app" to anything that you want... maybe "~~check-4-app-2-close~~". Just pick a name that won't exist in any other app window title that you run. If you happen to start a second instance of the script, that second copy should just exit because it sees a window with its name already running.