Remove or delete your sound drivers, and reinstall and see if
they show up in the Device Manager. If they do, and you still do
not get sound, you have a defective sound card or defective
speakers.
If they don't, you still have defective drivers, defective sound
card, or defective speakers.
One way to test is to install a borrowed, cheap sound card and see
if you can generate sound by clicking on the little triangle in the
Sound section of the Control Panel.
U might wanna try restarting yr com see how it goes first