Hello, all of a sudden my volume on my laptop stopped working. Even headphones or speakers that are plugged in wont work. I scroll over to the volume control, which now has a red circle with a white cross in the middle, and it says no audio output installed. I have tried many many things, been researching for days. I tried disabling and re-enabling, i've tried uninstalling and going to the main factorys website to manually instal the sound drivers(Realtek audio), and still nothing. My computer is a gateway laptop, NV574. I am now running windows 8 instead of windows 7 64-bit. I've had windows 8 for a year, and everything has been working properly until now. So what i did was system restores. But every time my laptop dies, it updates. And when it updates the audio device stops working, and i'm tired of doing system restores. Can someone assist?