Batch File Time Out

I am trying to deploy Microsoft Security Essentials and after the MSI install I run a batch file that should force MSE to update and hide. I use the following command in my batch file:

"C:\Program Files\Microsoft Security Client\msseces.exe" /update -hide

If I run this from the command line it returns instantly and starts the update but when I put this in the deploy package it just spins until it times out. I have tried a calling the command directly from the "Command to Run", I have tried creating a batch file that calls the command and returns a custom return code but each just waits until the time out period is done. Here are examples of the batch files I have tried

@echo off
"C:\Program Files\Microsoft Security Client\msseces.exe" /update -hide
exit /B 234

I have also tried putting a 6 second wait before and after the command

@echo off
PING 1.1.1.1 -n 1 -w 60000 >NUL
"C:\Program Files\Microsoft Security Client\msseces.exe" /update -hide
PING 1.1.1.1 -n 1 -w 60000 >NUL
exit /B 234

If I run this batch file from command line it runs fine and puts me back to the command prompt without any issues, and I get the error level returned. Any help would be appreciated. 

Thanks

Don