Solution is found. By adding below lines in the unattend sysprep answer file:

<settings pass="generalize">
<component name="Microsoft-Windows-PnpSysprep" processorArchitecture="amd64"...

Additional info: Mouse and Keyboard are all USB based Dell devices; MB is SuperMicro X9SRi-F (total 4 USB ports). BIOS is SuperMicro BIOS 3.2a. OS: WIN10 x64 LTSB (version 1607).

I am trying to create a Win10 x64 (LTSB, 1607) image for deployment. After all the configuration work was done, I tried to Sysprep the machine by using the command "Sysprep.exe /generalize /oobe...