Just leave the serial number out of UserData section of your answer file. vv Hmmz, that would leave you with the same answer that cluberti gave, then it pops up with a blank serial-field whcih you have to fill in, it won't show any, that's what the poster wanted.................... It's not possible I think, it's either blank, or when filled in winnt.sif, it passes without showing anything.........just like cluberti said before actually.........