if they use any windows , it means there are a dozen backdoor there.True, but if the plant is online connected to Internet with inadequate safeguards in place then it doesn’t matter if software is foreign or Iranian.
Have to see if this was back door intrusion or if this was simply a case of lackluster safeguards when connected to open web. Even the military has been seen with Windows XP on their computers.
but it seems they will die if they use an Os that they have access to its source code