Today both laptops in my household are now without audio. They are not linked in any way EXCEPT that they both had that automatic Win10 update. It's totally the fault of the update, so don't let them tell you otherwise, this is not a coincidence. I'll call Microsoft for a fix, and they better have a means to fix this. If I'm forced to accept updates, then they should be tried and true, not cobbled programs that are hinky to start with.
Anyway, I'll bet that there are more of us out there in Windows10 update land...