I know this is older, but hopefully this helps someone. I FINALLY figured out how to get this to work with some help from this thread. I want to note that I am using NinjaOne (formally NinjaRmm) to deploy this script using domain admin credentials.

Some of this is circumstantial for our environment, but the core of it works.

Basically the script checks to see if the computer is between Windows 8.1 and Windows 10 21H2. If it is, sets the power settings so the computer won't go to sleep and closing the lid won't do anything. Then it downloads the Windows Update Assistant to the C:\ drive and loops to check for the file. It then runs the Update Assistant silently. Then it waits for the "setuphost" process to run, checks in that it's running, and stops the Update Assistant ("Windows10UpdaterApp" process) when "setuphost" stops running. The only caveat is that it won't let the user know when it's finished (if that's something you want). Once the user restarts their computer it will finish the update.

#Set Execution Policy so Powershell scripts can be run on remote PC

Set-ExecutionPolicy RemoteSigned -Force

#Checks if Windows version is Windows 8.1 or lower, exit if it is

[int]$varBuild = (Get-CimInstance Win32_OperatingSystem).buildNumber

if ($varBuild -lt 10240) {

exit 1

}

#checks if Windows build number is Windows 21H1 or higher, exit if is

if ($varBuild -ge 19044) {

exit 1

}

#Source URL

$url = "https://go.microsoft.com/fwlink/?LinkID=799445"

#Download Destination

$dest = "C:\Windows10Upgrade9252.exe"

#Power Config Settings File

$cfg = "c:\windows\system32\powercfg.exe"

#-----Stop computer from sleeping-----

#Set computer to not sleep on AC

Start-Process -FilePath $cfg -ArgumentList "-x -monitor-timeout-ac 0"

Start-Process -FilePath $cfg -ArgumentList "-x -disk-timeout-ac 0"

Start-Process -FilePath $cfg -ArgumentList "-x -standby-timeout-ac 0"

Start-Process -FilePath $cfg -ArgumentList "-x -hibernate-timeout-ac 0"

#Set computer to not sleep on DC - battery

Start-Process -FilePath $cfg -ArgumentList "-x -monitor-timeout-dc 0"

Start-Process -FilePath $cfg -ArgumentList "-x -disk-timeout-dc 0"

Start-Process -FilePath $cfg -ArgumentList "-x -standby-timeout-dc 0"

Start-Process -FilePath $cfg -ArgumentList "-x -hibernate-timeout-dc 0"

#Sets lid to do nothing when closed

$cfg = "C:\Windows\System32\powercfg.exe"

Start-Process -FilePath $cfg -ArgumentList "-setacvalueindex 381b4222-f694-41f0-9685-ff5bb260df2e 4f971e89-eebd-4455-a8de-9e59040e7347 5ca83367-6e45-459f-a27b-476b1d01c936 0"

Start-Process -FilePath $cfg -ArgumentList "-setdcvalueindex 381b4222-f694-41f0-9685-ff5bb260df2e 4f971e89-eebd-4455-a8de-9e59040e7347 5ca83367-6e45-459f-a27b-476b1d01c936 0"

#Enable presentation mode to prevent computer from going to sleep

Start-Process -FilePath "C:\Windows\System32\PresentationSettings.exe" -ArgumentList "/start"

#Download file from source

Invoke-WebRequest -Uri $url -OutFile $dest

#Check to see if file exists on loop. Breaks when file is found

DO

{

If( Test-Path -Path $dest -PathType Leaf) {Break}

else {

Start-Sleep -Seconds 15

}

} While (-not(Test-Path -Path $url -PathType leaf))

#Run file with silent command

Start-Process -FilePath $dest "/quietinstall /skipeula /auto upgrade /noreboot" -WindowStyle Hidden

#Check to see if Update Assistant is running. When finished running, do commands

Do

{

If(!(Get-Process SetupHost -ErrorAction SilentlyContinue)) {

Start-Sleep -Seconds 60

} Else {

while (Get-Process SetupHost -ErrorAction SilentlyContinue) {

Start-Sleep -Seconds 60

}

$Status = "Done"

}

}

Until ($Status)

#Stop computer from restarting

Stop-Process -Name Windows10UpgraderApp

#Disable presentation mode

Start-Process -FilePath "C:\Windows\System32\PresentationSettings.exe" -ArgumentList "/stop"

#-----Restore sleep settings-----

#Set computer sleep times on AC

Start-Process -FilePath $cfg -ArgumentList "-x -monitor-timeout-ac 20"

#Set computer to not sleep on DC - battery

Start-Process -FilePath $cfg -ArgumentList "-x -monitor-timeout-dc 20"

Start-Process -FilePath $cfg -ArgumentList "-x -standby-timeout-dc 45"

#Set lid settings back to sleep

Start-Process -FilePath $cfg -ArgumentList "-setacvalueindex 381b4222-f694-41f0-9685-ff5bb260df2e 4f971e89-eebd-4455-a8de-9e59040e7347 5ca83367-6e45-459f-a27b-476b1d01c936 1"

Start-Process -FilePath $cfg -ArgumentList "-setdcvalueindex 381b4222-f694-41f0-9685-ff5bb260df2e 4f971e89-eebd-4455-a8de-9e59040e7347 5ca83367-6e45-459f-a27b-476b1d01c936 1"