It seems like there's a security MEASURE preventing sendkeys. The title will "activate," but that's it.

Here's what I've tried in a .bat file . . . First, to simply see if I can send an arrow right, or plus key, to expand from where it starts when you open the Task Scheduler:

REM How to use NirCmd to get to "Windows Defender" in the Task Scheduler
REM It would be nice if you could make a Shortcut to it, but you can't
REM
REM For now, run this with the Task Scheduler open, to make it simpler
REM C:\Windows\System32\taskschd.msc
REM C:\Windows\System32\control.exe schedtasks
REM
REM What KEYS would get me there?
REM left, right, up, down, plus, minus . . . they navigate/open/close the sub-directories
REM
REM right OR plus
REM down 4 . . . to Microsoft
REM right OR plus
REM down 1
REM right OR plus . . . expands the Windows folder
REM down 87 . . . to Windows Defender

REM The following ACTIVATES the window, but then the sendkey is not received
REM I give each command a SECOND, for now, so I know that going too fast isn't an issue

"C:\Program Files (x86)\NIRCMD\nircmdc.exe" win activate ititle "Task Scheduler"
"C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000

REM This doesn't work:

"C:\Program Files (x86)\NIRCMD\nircmdc.exe" sendkey right press
"C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000

REM This doesn't work:
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" sendkey plus press
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000

REM This doesn't work:
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" sendkey right down
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" sendkey right up
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000

REM This doesn't work:
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" sendkey plus down
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" sendkey plus up
REM "C:\Program Files (x86)\NIRCMD\nircmdc.exe" wait 1000I am quite curious to know why you want to do this.
And yet another new Topic...

You are on record setting pace for the same issue...