@dissectionalone the annoying thing is; the ZIP itself carrying the flag doesn't matter really, but the common extraction utilities like the built-in file exporer or even 7-Zip honor this flag and replicate it to all extracted files and when .NET detects a DLL "from the Internet" it will - in this case since I use it as a plugin system - silently not load them and the user is left with an "empty" application not doing anything. I have turned this off on my machines by default