Sound not working after installing Windows 10 on macOS Sierra

I presume you have installed Windows 10 via Bootcamp… or some other virtualization software, eg Parallels or Codeweavers. For Boot Camp, try this: from Microsoft…

https://support.microsoft.com/en-us/topic/troubleshoot-sound-problems-on-windows-with-boot-camp-8f9e3cde-cbdc-4477-b60c-40d9a4cd19ef

or this:

https://apple.stackexchange.com/questions/389492/bootcamp-windows-10-internal-speakers-dont-work-audio-port-lights-red

this is for Bootcamp.. if you installed Windows 10 via Parallels or Codeweavers, then i suggest you check their forums for help:

Parallels: https://forum.parallels.com/

Codeweavers: https://www.codeweavers.com/support/forums

that’s all I have

john b