I can't imagine an operating system could know how to make an iron screech..

Where does the sound actually come from, could it be a cooling fan? Such a misfunction (stopping transactions) sounds like a big problem if it's caused by the same reason the screeching sound is..if I were you, I'd open the box and find out where exactly the sound is coming from, then see if the piece of hardware is broken (maybe even try to replace it, as a test) and if it's under warranty then call the manufacturer/seller. Are you sure the sound and the stopping of transactions are caused by the same reason?
Btw. the topic of this thread says quite nothing to me ("Urgent"), so please use a bit more descriptive topic next time.