I've noticed Windows after XP had a strange bug where sometimes
   you'd have disabled sound devices.* The bug went unchecked
   through a few Windows versions - might be in the current one as
   well. Go to wherever they're hiding the Sound Devices, right
   click and see if you can do a "Show all Disabled Devices" and
   see if something pops up that looks usable.* Solved a similar
   problem on my Toshiba Laptop running Win7, and it helped out a
   Desktop running Vista a while back... and a desktop running
   Win8... might have carried through to 10 as well.