For those pondering on the Internet since 2004 how to do a silent install of AC3Filter, the answer lies with the application installer currently used by AC3Filter - Inno. To perform a fully unattended installation of AC3Filter 1.63b: ac3filter_1_63b_lite.exe /VERYSILENT /SP- /SUPPRESSMSGBOXES Full explanation of the switches is available here: http://www.appdeploy.com/tips/detail.asp?id=113