Mysterious Sound Issue :(

I've been having sound issues with my computer for awhile , but recently they've just gotten worse. All the sound on my computer would shut down (no audio devices) after about 5 or 6 hours of having it on and I would have to restart for it work again.

Then out of the blue , no audio devices would work ever ... so I reinstall the HD Realtek Audio driver and my usb headphones work , but not my speakers/audio mixer. The speakers themselves work fine , but there is some strange software issue on my computer. Even if I didn't have my speakers plugged in , I was always able to use the mixer to record sounds straight from the computer.

So I completely took off all the HD Audio drivers and High Definition Audio packages and reinstalled them - multiple times , using different versions of the sound driver. Right now I have the most recent one installed and according to device manager it IS working - but if HD Realtek Audio is in fact working shouldn't I be able to select as an audio device ?

Other things I have tried which didn't work

1. Using system restore - I can't even use this feature for whatever reason , whenever I try to do it "the computer was unable to restore to that date".

2. Finding source of the error with event viewer - there are no errors that coincide with the sound problem

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My headphones and microphone work perfectly fine , so it's not a sound card issue - but my mixer and rear input audio speakers are out and I really do need them for a lot of things. Any help on this matter would be greatly appreciated

 

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