Happens as a result of a reboot. System performance says all the sound devices are working properly, but when you click sound, it says there is no sound and the computer has zero sound.
The help says to enable the sound, but when I click the properties, I see nothing allowing me to enable or disable sound.
I tried down loading from the internet and nothing changes, it says everything is working properly, but the computer can't recognise it has a sound card.