Have a Compaq CQ50-130US, was running windows 7 no problems. Upgraded to Windows 8, Updated all drivers, Cannot get sound from speakers.
1. Go to device manager (Windows key + X, then press M). See if there are any "Unknown Devices." If so, right click on it and select "Properties," then go to the details tab, then in the drop-down menu labeled "Property," select Hardware ID. Copy and paste (or type) the first line in the box.
2. Go to the Speaker icon on the toolbar in the bottom righthand-side of the screen. Click on it, then click on "Mixer." Scroll through all the levels to ensure nothing is muted.
Let me know if either of those fix your problem! If not, we'll keep searching for a solution.