I am having the same problem with microphones not being recognized or working. Upgraded to Win10 on a 64 bit PC. Drilling down into device manager, I see an Event note "Device not migrated" although I have rebooted the computer several times.
The Logitec Camera Fusion USB event states:
Device USB\VID_046D&PID_08C1\6&474bcc&0&6 could not be migrated.
Last Device Instance Id: USB\VID_046D&PID_08C1\7&293F26B5&0&3
Class Guid: {36FC9E60-C465-11CF-8056-444553540000}
Location Path:
Migration Rank: 0xF00000000000F102
Present: false
Status: 0xC0000451
The Realtec PCle GBE Family COntroller has this event:
Device PCI\VEN_10EC&DEV_8168&SUBSYS_83A31043&REV_03\4&1ae87ee1&0&00E7 requires further installation.
My computer was working fine before the upgrade from Windows 7. This is a disaster as I cannot use Dragon, let alone Cortana.