RE: M14XR2 headphone/mic stopped working after Windows 10 upgrade
Thanks for posting.
Have you tried: Right click on the Tray Volume Icon, then select 'Playback devices' and navigate to the 'Playback' tab if it's not already displayed. Do you see any icon in the list that has a black downward-facing arrow and says 'Disabled' ? If so, right click the icon and select 'Enable'.