Surface Book will not recognize itself as a Surface and will not install drivers

I bought a used unit of Surface Book that doesn't recognize itself as a Surface device. In the System Properties it identifies as "OEMCH Product". It will not install drivers and has 18 unrecognized devices in Device Manager. One of them is the camera.

I tried to install the official driver pack but the installer will say this is not a Surface device and abort.

I even tried to use a 3rd party driver installer but that BSODed the Windows and I had to reinstall it.

I ran out of ideas, other than try to find individual drivers, if it's even possible. Any help would be welcome.