Why is my laptop’s sound not working after a software update?

Check Volume Settings: Check your gadget’s settings to verify that audio volume isn’t set to mute, and that the volume is turned up.
Check Device Manager: In the Device Manager list, locate the Sound, Video or Audio controllers. If you notice a yellow or red mark next to the device, you may need to reinstall or update the driver.
Troubleshoot Sound Problems: Select manually troubleshoot the problem to detect and diagnose the issue.
Run Audio Troubleshooter: Launch the audio troubleshooting tool to automatically fix the issue.
Restart the Device: Finally, perform a restart as it could be a temporary fault.