charleyvonne

Hi,

I wonder if it might be anything to do with a mic or line in volume?? Sometimes, if you have one of those at a high volume level, it can cause this. Try going to your control panel and to the sound option, disable any recording inputs and see if it stops. Don't forget to show disabled devices, so you don't lose sight of your inputs once you disable them!!

As for the powering down, I can't help you with that, sorry!

Good luck!