Setting permissions on Windows

On Windows, I have files and folders I’m downloading from the Internet and then putting on the user’s hard disk; it’s an updater for my application. The current user is the owner of the items (once they are downloaded), but other users have no permission on them, thus my application, once updated, only runs as the same user it was updated from.
Since it’s the same user that owns the application and that is logged in at update time, I assume I’d have rights to set everyone can read&execute, but how would one set permissions on Windows using Xojo?

This may help :

Thank you! icacls has helped me; simply resetting the permissions on the content of the folder does the trick.