The Sysinternals Suite Installer installer built by my scripts does not delete any registry settings under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce. Those registry values get automatically deleted by the Windows operating system after they have been run once, thus the name of this registry key. You add a registry value there for an application that needs to be run only a single time, and after that application is run, Windows removes the registry value by-design.