perhaps the solution is not to pause it ? especially if it is during a save point ?
each chapter is saved on a cutscene at least in the pc version it is shown by a star like spiral thingy.
also saying you have new pc means nothing if the spec of it is below the games requirements then it is actually the customers fault for not checking them before purchase.
still i have seen bugs, cutscene lag and some tearing and missing guns and the od sound glitch but never seen the brenda gltich or this.
i say if you mess around with save slots it's asking for trouble..