Thank you for the reply. My installation was never compiled to an ISO, for I directly copied the working folder to a bootable USB drive. I have a theory that perhaps I may have installed updates that were not applicable to my version of Windows (7 SP1 ULTIMATE), unless of course Win Toolkit checks for that and does not inject them? By the way, I must add, Win Toolkit is a very nice program--thank you for taking the time to make it Legolash2o.