Just as this previous thread, i've encountered some troubles upgradind to W10 but the link mentioned in 4th post is broken or unreachable for me.
At each boot after OS install (the initial setup wizard with cortana and the first boot into Desktop) audio works as usual, but even if i reboot after done nothing the device disappeared from Devce Manager.
As this wouldn't be enough, after few attempts, the device stopped to work in the first cortana setup and i can't find it even if i downgrade to W7 .
I can only see this, as audio device :
but not:
(the IDT codec)
Any tips?