I had the same problem. I went through the chat help and they uninstalled and reinstalled drivers. Now I have NO sound. Nobody at Microsoft is helping me. I'm not a techie...I'm a mom trying to do online classes with no sound. I would love it if somebody at Microsoft would either replace the device or give me my money back because I do not have time to troubleshoot and fix this myself. And its too late to return it...ugh. So frustrated!
Do not panic, in the start screen, slide your finger from right to left in your right side. In the Charm, select settings at the bottom of the charm. Then click on change menu setting. Under PC Settings click on Update and Recovery. There Click the option Recovery, and then Refresh, Get Started, which is the first option. After that just follow the Wizard accepting the changes. The system will refresh Windows no touching any of your files.