I am running Windows 7. This problem just started over the last month. Whenever I am watching YouTube, etc., the sound will completely drop out after a minute or so. I have to click on the little speaker icon at the bottom of the screen, turn the sound on and off a few times, work the volume slider up and down a few times, etc. until the sound comes back on. Then a couple minutes later it does the same thing again. Any idea what could be going on or how to fix this? Thank you!