here is the au3 script (Save as blah.au3) ; ----> The Office and reboot.js file error definitive fix! AutoItSetOption("TrayIconHide", 1) AutoItSetOption("WinTitleMatchMode", 4) BlockInput(0) ; ----> Add the name of your .msp file here. (I have mine in the same directory as the setup.exe file) RunWait( @ScriptDir & "\setup.exe /adminfile Office.msp", "", @SW_HIDE) ; ----> If you have a SLOW pc and are still getting the error make this number higher (I suggest by 5000 increments) Sleep(10000) Exit And then simply call it like so in WPI: "%wpipath%\Office07\Office_installer.exe" All you need to do is compile this with the auto-it program (Google is your friend) and place it in the same dir as the .msp file!