There is a driver, but there is no sound, what's the problem?

Question

Iron

Hi all!
Tell me please, what could be the problem?
Everything is shown here in the video: vk.com/video45070365_171850482
Installed Windows 8. The
drivers are also installed, but there is no sound. Everything is fine in BIOS.

Answer 1

Have you adjusted the volume?

Answer 2

and some player was not stuck in the usb for charging? my seven often makes it the default sound device, if it defines it. and while in the sound settings forcibly put the sound card back, nothing is heard