Update: Not sure if this was recent but you must now remove the (x86) out of the Program Files path (maybe they made the app x64 now?)

Here's a script I made that works really well. Of course you can tailor it for a GPO but standalone, it works wonders.

The gist is.. it will check if Dell Command Update is installed and if it is, it will run it and install all available updates. If it's not installed, it will look for the Dell Command Update msi and silently install it and then run it silently. If it cannot find the msi automatically, it will prompt you with an explorer GUI to browse to the .msi and silently install/run it.

Esentially.. a single click to do all Dell updates. It's also turning off Dell automatic update (handy for enterprise/small business) but you can delete/comment that out. In order to get the .msi you can run the Dell Command Update tool and in the middle of it running, you can find it in the Windows temp directory and copy it out of their and put it on a network share or USB stick for mass deployment.

@echo off
cls

tasklist | find /i "DellCommandUpdate.exe" && echo Closing existing Dell Command Update && taskkill /im DellCommandUpdate.exe /F
SET file=S:\Downloads\DellCommandUpdate.msi
if exist "C:\Program Files (x86)\Dell\CommandUpdate\dcu-cli.exe" goto:runDellUpdater
if exist "%file%" goto:installDellUpdater

echo Please navigate to the DellCommandUpdate.msi file
set dialog="about:<input type=file id=FILE><script>FILE.click();new ActiveXObject
set dialog=%dialog%('Scripting.FileSystemObject').GetStandardStream(1).WriteLine(FILE.value);
set dialog=%dialog%close();resizeTo(0,0);</script>"
for /f "tokens=* delims=" %%p in ('mshta.exe %dialog%') do set "file=%%p"

:installDellUpdater
echo Installing Dell Command Update app
"%file%" /quiet

:runDellUpdater
echo Disabling Dell automatic updates
REG ADD "HKLM\SOFTWARE\Dell\UpdateService\Clients\CommandUpdate\Preferences\Settings\Schedule" /v "ScheduleMode" /t REG_SZ /d "ManualUpdates" /f
echo Running the Dell Command Update app
"C:\Program Files (x86)\Dell\CommandUpdate\dcu-cli.exe" /ApplyUpdates
pause