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.