Lori, I deleted your question, but you said you had a laptop which keeps turning off after a certain amount of time, and you have to press the power button to reboot. I can't be sure of the definite cause, but I would suggest you go into the control panel and check 'power options.' Your laptop might be programmed to go to standby or shut down after a certain amount of time. My laptop never makes a sound when it goes into standby, but that may be a feature of your model. Just a suggestion. I hope it helps. Erin