This was a renewed product. I had purchased other renewed products and never had an issue. I’ve been on the computer 10 times since purchase and every time after 30 minutes the screen goes black and doesn’t respond via mouse nor keyboard. If a video is playing or iTunes, it starts skipping. I have to shut it down by holding start button. I was doing taxes one of these times, 😥😠. The seller was from Expercom.Confused why it wasn’t fixed when returned by previous purchaser.R.J DeHaan