You might be using your computer and then suddenly you use sound. You try to turn up the volume but a message appeared that there's no Audio device installed. You check your device manager and your Audio device is still in there. You just re-installed the driver yesterday. What going on?
There's nothing wrong with your computer, physically. There's a VIRUS causing this problem. if you try to go to SERVICES.MSC and look for the WINDOWS AUDIO SERVICE, you'll find that it's been disabled. If you start the service the sound will come on again so there's no need to re-install a the sound driver. What you do need is to get yourself a better anti-virus program. You can also just use MALWAREBYTE. It's free.