Hey Gunsmokingman, I copied your theme file exactly and tested it. It still doesn't work. Notice after you apply your theme, go to CONTROL PANEL > SOUNDS. There's nothing listed as a scheme, but if you look at the sounds, all the default Windows sounds are still enabled. Asterisk, Critical Stop, Default Beep, etc. all have sounds (you can click on the little play button for proof). Basically I can't figure out how to set the NO SOUNDS scheme by default, on an unattended install. Sure the posted regtweaks might work by itself, but if you try to call it in cmdlines.txt, it gets overwritten when winnt.sif applies the theme. So I tried to set the sound to the NO SOUNDS scheme in the theme file itself, as I've described in this thread, but still no workie. I'd be greatly appreciative if anybody who's figured out how to set the NO SOUNDS scheme by default on an unattended install, to post here and describe how they did it.! Thanks.