sounds like there is no driver for the sound system. Try going into 'right click my computer -- hardware - device manager - click on sound and delete it. Reboot and with luck it will be detected and the driver installed.
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.