Direct quote from MS ref.chm. Again, as Important You must put each command line in quotation marks Again, as raskren wrote, Must have; [unattended] UnattendMode=FullUnattended OemSkipEula=Yes OemPreinstall=Yes *** This Line *** Also from ref.chm The [GuiRunOnce] section contains commands to execute the first time an end user logs on to the computer after GUI-mode Setup completes. Commands called in the [GuiRunOnce] section process synchronously. Each application runs in the order listed in this section, and each command must finish before you run the next command. May want to use cmdlines.txt instead. I hope this helps and I'm sorry if you already know all this.