Just a quick suggestion, try going into Device Manager and right-clicking on your sound card then disabling and re-enabling it. After that try re-booting your pc.
You could also try uninstalling and re-installing your sound card.
This thread is now locked and can not be replied to.
Sony Xperia Z5 review: Hands-on with the phone which the Z3+ should have been
1995-2015: How technology has changed the world in 20 years
How to choose a photographer
iPhone 6S preview: What to expect from Apple's next iPhone