How to reinstall sound driver?

How to reinstall sound driver? - 1

Added (1). how can i reinstall sound driver in windows 8?
i'm using a lenovo lap top

Added (2). model lenovo B570e windows 8.1

Go to the manufacturers website navigate to the support section/drivers and find your computer. Your drivers will be listed
We could have given more helpful advice if you had included the make and model of computer

Here are the audio drivers for your Lenovo B570e laptop, my friend.