Is the supervisor of a website sinful when uploading a copy of Windows from the official company website for the benefit of members, if some members use this copy for forbidden things such as searching for songs or pornographic films?

What can be used for lawful and unlawful purposes, its default ruling is permissibility, unless it is highly probable that it will be used for unlawful purposes. Therefore, providing a copy of this system is not prohibited merely due to the possibility of it being used for unlawful matters.