Have you tried disabling "Fast Start-up"? That solved my sound issues. Open the Control Panel (the old-school one), go to "Hardware and Sound", then "Power Options", then "Choose what the power buttons do" (it's on the left), then uncheck the box next to "Turn on fast start-up"), then "Save Changes" and restart the computer. If the "Turn on fast start-up" option isn't there at first, click on "Change settings that are currently unavailable".

Edited February 22Feb 22 by booga

For me, making sure the sound outputs and microphone was configured to the same device in the sim settings helped a lot with this.